20.0 ml of kio3 is titrated with 0.125 m na2s2o3, requiring 32.79 ml to reach the endpoint. calculate the molarity of kio3.
Answers
The molarity of KIO₃ is 0.1025 M.
Given:
Volume of KIO₃ used = 20.0 mL = 0.0200 L
Volume of Na₂S₂O₃ used = 32.79 mL = 0.03279 L
Molarity of Na₂S₂O₃ = 0.125 M
From the balanced equation:
2Na₂S₂O₃ + KIO₃ → Na₄S₄O₆ + 2NaI + 2KCl
The stoichiometric ratio between KIO₃ and Na₂S₂O₃ is 1:2. This means that 1 mole of KIO₃ reacts with 2 moles of Na₂S₂O₃.
Using the volume and molarity of Na₂S₂O₃, we can calculate the number of moles of Na₂S₂O₃ used:
Moles of Na₂S₂O₃ = Molarity x Volume
= 0.125 M x 0.03279 L
= 0.00409875 mol
Since the stoichiometric ratio is 1:2, the moles of KIO₃ used will be half of the moles of Na₂S₂O₃:
Moles of KIO₃ = 0.00409875 mol / 2
= 0.002049375 mol
Now we can calculate the molarity of KIO₃:
Molarity of KIO₃ = Moles of KIO₃ / Volume of KIO₃ in liters
Molarity of KIO₃ = 0.002049375 mol / 0.0200 L
= 0.10246875 M
Therefore, the molarity of KIO₃ is approximately 0.1025 M.
The correct question is:
20.0 ml of KIO₃ is titrated with 0.125 M Na₂S₂O₃, requiring 32.79 ml to reach the endpoint. Calculate the molarity of KIO₃.
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Related Questions
what is a mixture of elements and compounds
Answers
The substance in the image above would be classified as a mixture of elements (option E).
What is a compound and mixture?A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.
On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.
According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.
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For the following unbalanced equation: Cu(s) + AgNO₃(aq) ➞ Cu(NO₃)₂(aq) + Ag(s) if 1.50 moles of copper and 3.00 moles of silver nitrate are available to react, how many grams of silver are produced? *
4 points
430 g Ag
324 g Ag
302 g Ag
108 g Ag
Answers
At 25 Celsius does hydrogen or nitrogen have the higher average kinetic energy?
Answers
Answer:
Yes
Explanation:
17×10−21 J/molecule.
CaC2 + 2H2O → C2H2 + Ca(OH)2If 4.8 moles of CaC2 are consumed in this reaction, how many grams of H2O are needed?
Answers
The given reaction is already balanced, that is to say tha the number of atoms in the reactants matches the number of atoms in the products. In the reaction, we can see the relationship between CaC2 and H2O. For each mole of CaC2 two moles of H2O react.
So, if 4.8 moles of CaC2 are consumed the moles of H2O needed will be:
Mol of H2O = Mol of CaC2 x 2
Mol of H2O = 4.8 x 2 = 9.6 mol of H2O
Now, to calculate the grams of H2O we will use the following equation and the mass molar of H2O.
Mass molar of H2O =18.01 g/mol
\(\begin{gathered} \text{Mass of H2O=Mol of H2O }\times Mass\text{ molar of H2O} \\ \text{Mass of H2O = 9.6 mol }\times18.01\frac{\text{ g}}{mol} \\ \text{Mass of H2O = 172.9 g} \end{gathered}\)So, if 4.8 moles of CaC2 are consumed in this reaction, 172.9 g of H2O are needed
10 of 12 Gold is element 79 . Which of the following statements is true? If a gold atom loses 1 electron, then it will become element 78 , platinum. An atom of gold always has an atomic weight of 79 .
Answers
The statement that is true about the gold atom and atomic weight is "An atom of gold always has an atomic weight of 79."
The atomic number of an element is determined by the number of protons in its nucleus. The element with atomic number 79 is gold, which has the symbol, Au. If a gold atom loses one electron, it does not change into platinum, which is an element with atomic number 78. The number of protons in a gold atom, and therefore its atomic number, remains constant.
The atomic weight of an element is determined by the number of protons and neutrons in its nucleus. Since gold has 79 protons, an atom of gold will have an atomic weight of approximately 197, which is the sum of the number of protons and neutrons in its nucleus.
Therefore, the statement that is true about the gold atom and atomic weight is "An atom of gold always has an atomic weight of 79."
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Draw the electron pair geometry for sulfur tetrafluoride, SF4 What's the name of the molecular shape of sulfur tetrafluoride?
Answers
From the structure of SF4 shown, the molecular geometry of the molecule is trigonal bipyramidal.
What is molecular geometry?
The term molecular geometry has to do with the arrangement of the electron pairs in a molecule.
The arrangement of electron pair in a molecule is based on the valence shell electron pair repulsion theory. From the structure of SF4 shown, the molecular geometry of the molecule is trigonal bipyramidal.
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When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The calorimeter contains 7.50 x 102 g of water at an initial temperature of 18.6 °C. The specific heat capacity of water is 4.184 J/gLaTeX: \cdot⋅°C and the heat capacity of the bomb is 8.20 x 102 J/°C. Calculate the final temperature of the water and the bomb
Answers
Answer:
x = 25.02 or 25°c
Explanation:
Given:
mass of water : 7.50×10² =750 gm
Ccal = 8.20× 10² = 820 J/°c
Let assume final temp = x°c
then, heat gained by the water + heat gained by calorimeter
= 25400 J
⇒ Mw × Cw× ΔTw+ Ccal ×ΔT = 25400
⇒ 750× 4.184 × (x - 18.6) + 820 ×(x-18.6) = 25400
⇒ x = 25.02 or 25°c
Which of the following statement is true about the following reaction?
3NaHCO3 ---> 3CO2+ 3H2O + Na3C6H5O7
A) 22.4 L of CO2 are produced for every liter of Na3C6H5O reacted
B) 3 moles of water is produced for every 3 moles of carbon dioxide
C) 51g of water is produced of every mole of Na3C6H5O7
Answers
The following statement is true about the given reaction:The statement that is true about the given reaction is:"51g of water is produced for every mole of Na3C6H5O7.
The reaction is given as:Na3C6H5O7 + 3HCl → 3NaCl + C6H5O7H2 + H2OIn the given reaction,Na3C6H5O7 and HCl react to give NaCl, C6H5O7H2, and H2O. To determine the mole of H2O formed, we need to balance the chemical reaction equation.The balanced equation for the given reaction is:Na3C6H5O7 + 3HCl → 3NaCl + C6H5O7H2 + 4H2OFrom the balanced equation, we can infer that 4 moles of H2O is produced for every mole of Na3C6H5O7.So, the correct statement is:"51g of water is produced for every mole of Na3C6H5O7."For such more question on mole
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A student prepares a solution by dissolving 20.0 g of aluminum chloride (AlCl3) in enough water to produce 500 mL of solution. What is the molarity of the solution? Question 18 options: 0.040 M 0.320 M 0.080 M 0.160 M
Answers
The Molarity of the solution is 0.040M and the correct option is option A.
What is Molarity?
Molarity, also called molar concentration, is used to measure the quantity of a solute dissolved in a volume of solvent using the formula-
Molarity = number of moles of solute ÷ volume of solution in liters
Molarity of a solution is measured in moles per liter and is denoted by M.
When 1 mole of a substance is dissolved in water and the solution is made up to 1L, a solution with a molarity of 1M is produced.
Given,
Mass of aluminium chloride = 20g
Volume of solution = 500 ml
Molarity = mass of solute ÷ volume of the solvent in L
= 20 ÷ 500
= 0.040 M
Therefore, the Molarity of the solution is 0.040M and the correct option is option A.
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Help a person out please
Answers
Explanation:
here I haven't drawn the diagram but I have marked them where they will be .
So if it helps don't forget to like and Mark me
CH3-CH2-CH-CH2-NH3
CH3
i) Write the IUPAC name of above structure.
Answers
Answer:
The IUPAC name of above structure is N-Methylethanamine.
Answer:
N-methylprop-2-en-1-amine.
C3H 2 = C2H C1H2NHCH3
Hint:
One can solve this question by keeping in mind the IUPAC nomenclature rules. If nitrogen is present, it can be either amine or amide functional group. Parent carbon chain can be determined by calculating the number of carbons in the longest carbon chain.
Complete step by step answer: If organic compounds contain one principal functional group then the longest continuous chain of carbon atoms having that functional group is selected. Functional groups are specific substituents in the molecules which are responsible for the characteristic chemical reactions of those molecules. The IUPAC nomenclature of organic chemistry is a system of organic chemical compounds in nomenclature of chemicals as stated by the International Union of Pure and Applied Chemistry. Informally we call it the Blue Book. The book mentions certain rules for naming of compounds having functional groups. As per IUPAC rules, the first thing is to select the longest continuous chain. In the given compound, the longest chain has three carbon atoms, so its root word is prop. We will start the number from carbon which is next to nitrogen to the left. This gives us a double bond on second position and can be written as 2-ene. We can see that there is a methyl group attached to the nitrogen of amine functional group, so we can write it as N-methyl. Putting the suffix as the name of the functional group,
we end up getting the correct IUPAC name of this compound as N-methylprop-2-en-1-amine.
Note:
The Amine group is represented by NH3 . When we
replace the hydrogens attached to nitrogen with any other compound, it becomes either primary or secondary or tertiary amine with respect to the number of hydrogens replaced. In our case, two hydrogens were replaced, so the compound is secondary amine.
With which group would group 18 most likely bond
Answers
Answer:
The noble gases (Group 18) are located in the right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactivE
Explanation:
4. Convert 850,000,000 milliliters to kiloliters. Use the conversion factors 1 liter = 1,000 milliliters and 1 kiloliter = 1,000 liters.
850 kiloliters
8. 50 - 10% kiloliters
ESO
850 liters
0. 850 kiloliters
Answers
850 kiloliters are equal to 850,000,000 millilitres.
To convert 850,000,000 milliliters to kiloliters, we can use the conversion factor 1 kiloliter = 1,000 liters and 1 liter = 1,000 milliliters.
First, we need to convert the milliliters to liters by dividing 850,000,000 by 1,000:
850,000,000 milliliters / 1,000 = 850,000 liters
Then, we can convert the liters to kiloliters by dividing 850,000 by 1,000:
850,000 liters / 1,000 = 850 kiloliters
Therefore, 850,000,000 milliliters is equivalent to 850 kiloliters.
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Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on ________. the car driven governmental incentives for research the amount of fossil fuels that are invested in long-term storage the source of oxygen used for the process the source of energy used to produce the hydrogen
Answers
A hydrogen energy system is made up of hydrogen production, transportation, storage, utilization etc. Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on the source of energy used to produce the hydrogen.
Hydrogen fuel cells often makes electricity by using hydrogen and oxygen atoms. The hydrogen is said to reacts with oxygen across an electrochemical cell.Hydrogen is known to carry some amount of energy carrier and can also deliver or store a large amount of energy. Hydrogen is often used in fuel cells to generate electricity, or power and heat.
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Rank from highest to lowest ionization energy. To rank items as equivalent, overlap them.
Answers
Answer:
Ranked from highest to lowest
Oxygen - 13.6181 kJ/mol
Silicon - 8.1517 kJ/mol
Nickel - 7.6398 kJ/mol
Manganese - 7.434 kJ/mol
Barium - 5.2117 kJ/mol
Answer the following questions in complete sentences.
A. Identify club soda as an element, compound, or mixture.
B. Explain the classification of club soda identified in Part A.
Answers
Answer:
a) club soda is a compound
b) Club soda is a manufactured form of carbonated water, commonly used as a drink mixer. Sodium bicarbonate, potassium sulfate, potassium bicarbonate, potassium citrate, or sodium citrate is artificially added to replicate constituents commonly found in natural mineral waters
A gas has a volume of 1.22L at 179K. Once heated, the same gas now has a volume of 6.1L at 285K and 1.34atm. What was the original pressure of the gas?
Answers
Express each of the following numbers in exponential notation with correct significant figures. \{Enter your answer using one of the following foats: 1.2e−3 for 0.0012 and 1.20e+2 for 120.) (a) 670. बत्र (b) 0.03427 (c) 536.5 ब.] (d) 24072 ब. (e) 4000,0 ब.1. (f) 0.00000000601 ब.SO (g) 0.007203 ब요
Answers
Exponential notation, also known as scientific notation, is a way of representing numbers that are either very large or very small. It involves expressing a number as the product of a coefficient and a power of 10.
(a) 670 expressed in exponential notation with correct significant figures is 6.70 × 10².
(b) 0.03427 expressed in exponential notation with correct significant figures is 3.427 × 10⁻².
(c) 536.5 expressed in exponential notation with correct significant figures is 5.365 × 10².
(d) 24072 expressed in exponential notation with correct significant figures is 2.4072 × 10⁴.
(e) 4000,0 expressed in exponential notation with correct significant figures is 4.0000 × 10³.
(f) 0.00000000601 expressed in exponential notation with correct significant figures is 6.01 × 10⁻⁹.
(g) 0.007203 expressed in exponential notation with correct significant figures is 7.203 × 10⁻³.
Note that in exponential notation, numbers are expressed as a coefficient (a number between 1 and 10) multiplied by a power of 10. The coefficient must be rounded to the correct number of significant figures.
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During an experiment, the percent yield of calcium chloride from a reaction was 80.34%. Theoretically, the expected amount should have been 115 grams. What was the actual yield from this reaction? CaCO3 + HCl → CaCl2 + CO2 + H2O 90.1 grams 92.4 grams 109.2 grams 115.3 grams
Answers
The actual yield from the reaction is 92.4 grams.
What is percent yield?Percent yield is the difference in the percent of theoretical yield to the percent of actual yield.
The balanced equation is
CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
Step 1- calculate the moles of CaCO₃
\(\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\rm Number\;of \;moles= \dfrac{104 g}{100.08 g/mol} = 1.039 mol.\)
The amount of CaCl₂ produced = no. of moles x molar mass
\((1.039 mol)\times (110.98 g/mol) = 114.3 g.\)
Step2- calculate the percent yield
\(\rm percent\; yield = \dfrac{(actual\; yield)}{(theoretica\; yield)} \times 100\\\\\\\rm actual\; yield = \dfrac{(percent\; yield)\times (theoretica\; yield)}{100} \\\\\rm actual\; yield = \dfrac{(80.15)\times (115.3g)}{100} = 92.4 g\)
Thus, the actual yield is 92.4 g.
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Answer:
92.4 grams
Explanation:
stay safe!
How can you cause a physical change?
ill give 10 points
Answers
crushing a can
melting an ice cube
boiling water
mixing salt and water
breaking a glass
dissolving sugar and water
shredding paper
chopping wood
Is heat a form of kinetic energy or potential energy?
Answers
(01.06 MC)
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Group of answer choices
A:Carbon and oxygen are chemically bonded in it.
B:Carbon and oxygen retain their original identity in it.
C:It can be separated into carbon and oxygen using physical methods.
D:The proportion of carbon and oxygen is different in different samples of the gas.
Answers
Answer:
It can be chemically separated if it is a compound. The gas carbon dioxide is a pure substance.
Explanation:
Carbon dioxide is a pure substance because it has a fixed composition no matter where it was taken. Each molecule of carbon dioxide will always have 1 carbon and 2 oxygens.
When using a flame to heat a liquid in a test tube, which one is NOTsafe
A.
the test tube is open (no rubber stopper)
B.
the open end is pointed away from you and your lab partner
C.
the test tube is closed with a rubber stopper
D.
the hot tube must be cooled before placing it into an ice bucket
Answers
Answer:
A ( I think? )
Explanation:
your welcome
Eyes, nose, mouth would each be an example of a(n)
a. organ system
b. Cell
c. tissue
d. organ
Answers
Answer:
I think it is Organ
Explanation:
chemistry work, help please.
Answers
The average atomic mass of the Mc in the sample, given the that the hypothetical mass spectrum of Mc, is 289.1 amu
How do i determine the average atomic mass of Mc?First, we shall determine the atomic mass of each isotope as shown from the spectrum. Details below:
For 1st isotope
Number of atom = 3Total atoms = 10Atomic mass = 288.2Atomic mass of 1st isotope = ?Atomic mass of 1st isotope = (Number of atom /total atom) × atomic mass
Atomic mass of 1st isotope = (3 / 10) × 288.2
Atomic mass of 1st isotope = 86.46 amu
For 2nd isotope
Number of atom = 5Total atoms = 10Atomic mass = 289.2Atomic mass of 2nd isotope = ?Atomic mass of 2nd isotope = (Number of atom /total atom) × atomic mass
Atomic mass of 2nd isotope = (5 / 10) × 289.2
Atomic mass of 2nd isotope = 144.6 amu
For 3rd isotope
Number of atom = 2Total atoms = 10Atomic mass = 290.2Atomic mass of 3rd isotope = ?Atomic mass of 3rd isotope = (Number of atom /total atom) × atomic mass
Atomic mass of 3rd isotope = (2 / 10) × 290.2
Atomic mass of 3rd isotope = 58.04 amu
Finally, we shall determine the average atomic mass of Mc. Details below:
Atomic mass of 1st isotope = 86.46 amuAtomic mass of 2nd isotope = 144.6 amuAtomic mass of 3rd isotope = 58.04 amuAverage atomic mass of Mc =?Average atomic mass of Mc = sum atomic masses of isotopes
Average atomic mass of Mc = 86.46 + 144.6 + 58.04
Average atomic mass of Mc = 289.1 amu
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When the reaction stops. the undissovle penny is removed. what is the mass of the unidssolved penny?
Answers
When the reaction stops and the undissolved penny is removed, the mass of the undissolved penny will depend on the initial mass of the penny before the reaction occurred. To determine the exact mass of the undissolved penny, it would be necessary to weigh it using a scale.
Copper oxide dissolves in water, but it usually takes a long time. The combination of vinegar (a weak solution of acetic acid), and table salt (sodium chloride) helps to dissolve the copper oxide, and also forms the blue copper(II) ion, which is soluble in water. The penny becomes shiny again!
Current pennies are made from a piece of zinc coated with a thin layer of copper. The modern penny is not 100% pure copper as it was prior to the 1960's. You will dissolve the entire penny in the concentrated nitric acid.
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Miley partridge if you see this I am CJ and these hearts are for you ❤❤❤❤❤❤
Answers
Answer: not to be rude but who is Miley partridge? If she is a friend then u r a kind hearted person
Explanation:
Determine the percent yield for the reaction between 6.92g of K and 4.28g of O2 if 7.36g of K2O is produced?
Answers
The percent yield for the reaction between 6.92g of K and 4.28g of O2 if 7.36g of K2O is produced is 88.2%.
How is percent yield calculated?The percent yield can be calculated by using the experimental yield and theoretical yield in the formula:
Percent yield of a compound = Experimental yield/Theoretical yield x 100%
Here, we have
mass of potassium = 6.92g, amount of potassium in the given mass = (1 mol K/ 39g K) x 6.92g K = 0.17 mol K
mass of oxygen = 4.28 g, amount of oxygen in the given mass = (1 mol O2/32g O2) x 4.28g = 0.133 mol O2
The balanced chemical equation can be written as,
4K + \(O_{2}\) → 2\(K_{2}\)O
Since potassium is the limiting reagent in this case,
The amount of potassium oxide formed by 0.17 mol Potassium = 2 mol K2O/4 mol K x 0.17 mol K = 0.88 mol K2O.
Mass of 0.88 moles of potassium oxide = 94.2 K2O/1 mol K2O x 0.88 = 8.34g K2O.
Therefore, percent yield = 7.36 g K2O/8.34g K2O x 100% = 88.2%
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Which is not a physical state of matter?
A. Solid
B. Liquid
C. Plasma
D. Gas
Answers
Answer: Plasma
Explanation:
Answer: Plasma
Explanation:
Im not sure if I worked out number 5 correctly if I didn’t can someone put me on the right track.
Answers
The quantity of space occupied by one mole (of gas) at these usual circumstances, or 22.4 dm 3, is known as the molar air volume. P1 = 4.0x10 V1 = 0.042 P2 = 0.10 V2 abm 160,000 0.95 = 168421.0 L is the equation of decomposition for an explosive.
What is a gas's volume?The area occupied by gaseous particles under normal temperature and pressure circumstances is referred to as the volume of gas. It is identified as a "V." The letter "L" stands for "litres," an SI unit of volume. At normal temperature, a mole in air does have a mass of 24 m3, or 24 000 cm3. A molar volume for a gas is the name given to this quantity.
Is the gas's volume zero?Modern theory still views absolute zero as special even though gases won't actually have zero volume there because they'll be solids, so solids have volume. In fact, any situation involving the petrol law requires that we use temperature in Kelvin. a graphic illustrating the relationship between temperature and volume.
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