Calcium hydroxide is dissolved in water until the pH of the solution is 11.44. The hydroxide ion concentration (OH) of the solution is: A) 3.6 10-12 M OB) 5.5 * 10-3M °C) 2.8 x 10-3M D) 1.4 x 10-3M OE) none of these
Answers
The hydroxide ion concentration (OH-) in a solution with a pH of 11.44 can be determined using the concept of the pH scale and the relationship between pH and the concentration is 2.8×10⁻³M Option C is correct.
The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution. It ranges from 0 to 14, where pH values below 7 indicate acidity, values above 7 indicate alkalinity, and a pH of 7 represents neutrality.
To calculate the hydroxide ion concentration (OH-) based on the pH, we can use the formula: OH- concentration = \(10^{(-pOH)}\), where pOH is the negative logarithm of the hydroxide ion concentration.
Since \(pH + pOH\) = 14, we can find the pOH value by subtracting the given pH of 11.44 from 14, which gives us a pOH of 2.56.
Now, using the formula OH- concentration = \(10^{(-pOH)}\), we can calculate the hydroxide ion concentration by substituting the pOH value: OH- concentration = 10^(-2.56).
=2.8×10⁻³M
Performing the calculation will give us the hydroxide ion concentration in the solution.
Learn more about pH here
https://brainly.com/question/31826382
#SPJ11
Related Questions
What happens when an acid reacts with a base?
A. All of the answers are correct.
B. Water is formed.
C. They neutralize each other.
D. A salt is formed.
Answers
Answer:
They neutralize each other
A sample of hydrogen has a volume of 12 L under a pressure of 3 atm. What will the pressure of this gas be if the volume were decreased to 6 L?
Answers
The pressure of the gas if the volume were decreased to 6L is 6 atm.
How to calculate pressure?Boyle's law of ideal gases states that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.
The Boyle's law equation is given as follows;
P₁V₁ = P₂V₂
Where;
P₁ = initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
3 × 12 = 6 × P
36 = 6P
P = 6atm
Therefore, the pressure of the hydrogen gas is 6 atm.
Learn more about pressure at: https://brainly.com/question/1437490
#SPJ1
When does only the vertical component of light pass through a Polarizer?
Answers
The initial temperature of a reaction is 24.7 °C. The temperature decreases by 3.2 °C. What is the new temperature of the reaction? Someone help
Answers
Answer:
I think it's 21.5 *C
Explanation:
Tara is performing a chemical experiment, at one point she needed to know whether the solution is acidic or basic so she used the PH meter to measure the solution. She got a reading of 13.4,
1. Is the solution acidic or base? Explain why.
2. What will happen to the PH when she will add water to the solution?
Answers
It is a base because its pH is greater than 7
(not sure about the second sorry!)
What is the product of reductior of ethyl 4-oxobutanoate with sodium borohydride in ethanol at room temperature for 30 minutes? A Ethyl 4-hydroxybutanoate B 1,4-Butanediol C 4-Hydroxybutanal D Ethyl butanoate
Answers
The product of the reduction of ethyl 4-oxobutanoate with sodium borohydride in ethanol at room temperature for 30 minutes is Ethyl 4-hydroxybutanoate (Option A).
What is ethyl 4-oxobutanoate and what does it look like?
Ethyl 4-oxobutanoate, also known as ethyl acetoacetate, is an organic compound with the chemical formula CH₃C(O)CH₂CO₂C₂H₅. It is derived from acetoacetic acid and is an ester of acetoacetic acid.
Ethyl 4-oxobutanoate is a colorless liquid with a fruity odor.
During the reduction reaction, sodium borohydride (NaBH₄) acts as a reducing agent, donating hydride ions (H-) to the carbonyl group of the ethyl 4-oxobutanoate. This results in the conversion of the carbonyl group (C=O) to a hydroxyl group (OH) and the formation of the corresponding alcohol.
Therefore, the correct product of the reduction of ethyl 4-oxobutanoate with sodium borohydride is Ethyl 4-hydroxybutanoate (Option A).
To learn more about ethyl 4-oxobutanoate,
https://brainly.com/question/28169820
#SPJ4
Part B Change the distance of the electron from the center position as it moves up and down. What relationship do you notice between the distance from the center position and the amplitude of the wave?
Answers
Answer:
The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.
Explanation:
Answer:
The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.
Explanation:
Edmentum Sample Answer.
The water released by the reaction (mass = 0.00020 g) was calculated as was the
heat energy released (-9.6 x 10 kJ). Given the information you have about the 5
accelerants, see if you can determine which liquid is the accelerant under the
threshold.
1. Acetone:
C3H60+
02-
CO2 +
H20 ΔΗ =
2. Coleman Fuel:
C5H12 +
02-
CO2 +
H20 ΔΗ =
3. Ethyl alcohol
C2H60 +
02 -
CO2 +
H20 ΔΗ =
4. Mineral Spirits:
C10H22 +
02-
CO2 +
H20 AH =
5. Turpentine:
C10H16 +
02 -
CO2 +
H20 ΔΗ =
The accelerant used was
I
which is commonly found in:
Answers
Which statement could help explain the change in water temperature?
Higher turbidity allows water to absorb more sunlight, causing a decrease in temperature.
ure
Higher turbidity allows water to absorb less sunlight, causing a decrease in temperature.
Higher turbidity allows water to absorb more sunlight, causing an increase in temperature.
Higher turbidity allows water to absorb less sunlight, causing an increase in temperature.
Answers
Answer:
C
Explanation:
Higher turbidity allows water to absorb more sunlight, causing an increase in temperature.
Iron filings burn when sprinkled over a gas flame to produce iron(III) oxideWhat type or types of reaction is this?
Answers
Iron filings burning when sprinkled over a gas flame to produce iron(III) oxide is an example of a combustion reaction.
.In this case, the iron filings (Fe) react with oxygen from the gas flame to form iron(III) oxide (Fe₂O₃). The reaction can be represented by the following equation:
4Fe + 3O₂ → 2Fe₂O₃
During the combustion process, the iron filings undergo a chemical change as they combine with oxygen to form a new compound, iron(III) oxide. This reaction is exothermic, meaning it releases energy in the form of heat and light. The heat produced causes the iron filings to burn, resulting in the formation of iron(III) oxide.
Iron(III) oxide is a reddish-brown compound commonly known as rust. It has a different chemical composition and physical properties compared to the original iron filings. The reaction between iron and oxygen is highly exothermic, making it a suitable demonstration for the combustion process.
In summary, the burning of iron filings when sprinkled over a gas flame to produce iron(III) oxide is a combustion reaction where iron reacts with oxygen to form a new compound, releasing heat and light in the process.
Learn more about gas flame
brainly.com/question/28447778
#SPJ11
What do you call an animal with multiple organs ?
Answers
Answer: Hermaphrodite
hope this is helpful
For a 2px orbital of a hydrogen atom, the wave function has cylindrical symmetry about the
Select only the best answer:
x-axis
y-axis
z-axis
Answers
For a 2 px orbital of a hydrogen atom, the wave function has cylindrical symmetry about the x- axis. Option A is the correct answer.
The 2 px orbital is one of the three dum bbell -shaped p orbitals in the hydrogen atom. It has a cylindrical symmetry, meaning that the electron density distribution is symmetric around the x- axis. This indicates that the probability of finding the electron is the same at equal distances from the x- axis. In contrast, the y- axis and z- axis do not exhibit this cylindrical symmetry for the 2 px orbital. Therefore, the correct answer is the x- axis.
Option A is the correct answer.
You can learn more about hydrogen atom at
https://brainly.com/question/28499820
#SPJ11
When mixing 5.0 moles of HZ acid with water up to complete a volume of 10.0 L, it is found that at
reach equilibrium, 8.7% of the acid has become hydronium. Calculate Ka for HZ. (Note: Do not assume is disposable. )a. 1.7×10^−3
b. 9.5×10^−2
C. 2.0×10^−2
d. 4.1×10^−3
e. 3.8×10^−3
f. 5.0×10^−1
Answers
therefore the correct option is d) 4.1×10⁻³.
Given that the initial concentration of HZ is 5.0 moles and at equilibrium, 8.7% of the acid has become hydronium.
The concentration of HZ that has not reacted is (100% - 8.7%) = 91.3%.
The final concentration of HZ is 5.0 × 0.913 = 4.565 moles.
The final concentration of the hydronium ion is 5.0 × 0.087 = 0.435 M.HZ ⇌ H+ + Z-Ka
= [H+][Z]/[HZ]Ka
= [H+][Z]/[HZ]
= [0.435]² / 4.565
= 0.041
Which is the same as 4.1 × 10-3.
We know that HZ is an acid that will partially ionize in water to give H+ and Z-.
The chemical equation for this reaction can be written as HZ ⇌ H+ + Z-.
The acid dissociation constant (Ka) of HZ is the equilibrium constant for the reaction in which HZ ionizes to form H+ and Z-.Thus, Ka = [H+][Z]/[HZ].
The given problem is a typical example of the dissociation of a weak acid in water. We are given the initial concentration of HZ and the concentration of hydronium ions at equilibrium.
To find the equilibrium concentration of HZ, we can use the fact that the total amount of acid is conserved.
At equilibrium, 8.7% of HZ has dissociated to give hydronium ions.
This means that 91.3% of the original HZ remains unreacted.
Therefore, the concentration of HZ at equilibrium is 5.0 × 0.913 = 4.565 M.
The concentration of hydronium ions at equilibrium is 5.0 × 0.087 = 0.435 M.
Using the equation Ka = [H+][Z]/[HZ], we can substitute the values of the concentrations and the equilibrium constant into the equation and solve for Ka.
Ka = [H+][Z]/[HZ]
= [0.435]² / 4.565
= 0.041 or 4.1 × 10-3.
The answer is d) 4.1 × 10-3.
To know more about hydronium visit:
https://brainly.com/question/14619642
#SPJ11
What is the chemical name of K2O?
potassium oxygen
potassium oxide
oxygen potasside
oxygen potassium
Answers
Answer:
potassium oxide
Explanation:
hope this helped have a good day bye bye
Answer:
Potassium oxide
Explanation:
Looking at the Periodic table of elements-
K - Potassium - Metal
O - Oxygen - Non - Metal
Knowing that K₂O is a ionic compound. It means that they are compounds that's made of a metal and nonmetal.
The name of the metal is written first, followed by the name of the nonmetal which its will end with –ide.
Based on the following information above, we can conclude that the chemical name of K₂O is Potassium Oxide
RevyBreeze
Y’all, I need help on this help me
Answers
ask
ask the question bro, i will be ready to assist.
maths/ch3m/physics/bio
Which of these conclusions is correct about P and Q in the diagram?
P represents the land and Q represents the ocean.
P represents the ocean and Q represents the land.
P represents the land and Q represents the atmosphere.
P represents the atmosphere and Q represents the ocean.
Answers
Answer:
P represents the atmosphere and Q represents the ocean.
Explanation:
what is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? its mass percent composition is 24.25% ff , 75.75% snsn .
Answers
The empirical formula for stannous fluoride, a substance added to toothpaste to prevent tooth decay, is SnF2, if its mass percentage composition is 24. 25% F, 75.
Sn 75.75 119/75.75m= 1\s F 24.25 19/24.25 = 2
SnF2 is the resultant compound.
Thus, the information provided is accurate.
You must first determine the mass percentage of the elements in the compound for any empirical formula problem.
Change the% to grammes after that.
Next, split each mass by its associated molar mass.
Divide all numbers by the moles response that is the least.
The chemical compound known as stannous fluoride, sometimes known as tin(II) fluoride (from the Latin stannum, "tin"), has the formula SnF2. It is a colourless solid that is utilised as a toothpaste ingredient.
To learn more about fluoride please click on below link
https://brainly.com/question/2807538
#SPJ4
please help hehehheh
Answers
Answer: C is the definete awnser so yeah its just a lol of REHEHEHEHHEHEHEHEHEHEHEHEHEHEHHEHEHEHEHEHEHEHEHHEHEHEHEHHEHEHEHEHEHEHEHEHHEHEHEHEHEHEHEHEHEHEHEHHE
nucleic acid and carbohydrates are both types of what
Answers
Answer:
macromolecules.
Explanation:
Nucleic acids and carbohydrates are both types of organic molecules known as macromolecules.
Asap!!!!!!makring brainliest please asap help
17. applying assume that you need to raise a small building two feet higher
than its current position. what advice might archimedes give you? explain.
Answers
Archimedes' principle of buoyancy states that the buoyant force acting on an object submerged in a fluid reaction is equal to the weight of the fluid displaced by the object.
In other words, if you can displace enough fluid with a lighter weight than the object, you can lift the object up. In this case, you can apply Archimedes' principle by digging a hole around the building and filling it with a lighter weight material like Styrofoam or hollow blocks. These materials will displace enough fluid to raise the building up to the desired height.
Archimedes famously said, "Give me a place to stand and I will move the earth." This statement demonstrates his understanding of the principles of the lever and fulcrum. A lever is a rigid bar that pivots around a fixed point called a fulcrum, and by applying force to one end of the lever, you can lift or move an object at the other end.
To know more about fluid reaction visit:
https://brainly.com/question/29236487
#SPJ11
Can someone plz help me? :(
Answers
Answer:
b
Explanation:
HURRY ! Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this? Increase the intensity of red light. Decrease the intensity of red light. Use a different colored light that has a higher frequency. Use a different colored light that has a lower frequency.
Answers
Answer:
using a diffrent colored light with a higher frequency
Explanation:
How many photons at 660 nm must be absorbed to melt 5.0 x 102 g of ice? on average, how many h20
Answers
The approximately 5.55 x 10^23 photons at 660 nm must be absorbed to melt 5.0 x 10^2 g of ice.
To determine the number of photons at 660 nm that must be absorbed to melt 5.0 x 10^2 g of ice, we need to consider the energy required to melt the ice and the energy carried by each photon.
First, let's calculate the energy required to melt the ice. The heat of fusion of water is 334 J/g. Therefore, the total energy required to melt 5.0 x 10^2 g of ice can be calculated as follows:
Energy = mass x heat of fusion
Energy = (5.0 x 10^2 g) x (334 J/g)
Energy = 1.67 x 10^5 J
Next, we need to calculate the energy carried by each photon at 660 nm. The energy of a photon can be calculated using the formula:
Energy = Planck's constant x speed of light / wavelength
The wavelength of the photon is given as 660 nm, which is equivalent to 660 x 10^-9 meters. Planck's constant is 6.63 x 10^-34 J s, and the speed of light is 3.00 x 10^8 m/s. Substituting these values into the formula, we can calculate the energy carried by each photon:
Energy = (6.63 x 10^-34 J s) x (3.00 x 10^8 m/s) / (660 x 10^-9 m)
Energy = 3.01 x 10^-19 J
Now, to find the number of photons required to provide the total energy needed to melt the ice, we divide the total energy required by the energy carried by each photon:
Number of photons = Energy required / Energy per photon
Number of photons = (1.67 x 10^5 J) / (3.01 x 10^-19 J)
Number of photons = 5.55 x 10^23 photons
To know more about photons visit:
brainly.com/question/28582175
#SPJ11
If you take too much of a chemical when working, what are you supposed to do with the excess?
Answers
If we out take too much of a chemical when working, we should not put the excess chemical into the reagent bottle again.
Excess chemicals that are taken out while working should never be returned to the reagent containers. Because by doing so the entire supply might become contaminated. Instead, give your excess chemical to other students or put them in the waste containers.
When too much of chemical from the storage bottle NEVER put the excess chemical back in the bottle. This will contaminate the entire fresh stock. If spillage has occurred, cleaning up the balance is strongly recommended. Do not blow on the balance, clean the balance with a tissue or a small brush.
Learn more about safety measures while working from the link given below.
https://brainly.com/question/4805181
#SPJ4
Which measure of a gas does the expression nRT represent? (1 point)
Answers
The term pVnRT is also called the compression factor and is a measure of the ideality of the gas. An ideal gas will always equal 1 when plugged into this equation……
How many calories (units of heat energy) per serving is an 18 pound deep fried turkey?
Answers
Answer:
245
Explanation:
BECAUSE THERE ENERGY THEY GIVES THE IMPRESSION OF THE TURKISH
A molecule contains 3 atoms. It has 1 triple bond and 1 single bond. There are no lone pairs on any of the atoms. How many rheds are within the molecule?.
Answers
The central atom of the molecule has three electrons on its valence shell.
What is the valance shell electro pair repulsion theory?
The valance shell electron pair repulsion theory shows us the number of electron pairs that can be found on the valance shell of the central atom of the molecule. Recall that the shape of the molecule is determined by the number of electron pairs that can be found on the valance shell of the central atom of the molecule.
Hence, given the fact that the molecule contains 3 atoms. It has 1 triple bond and 1 single bond, we can be able to conclude that the molecule has three electron pairs on its valance shell.
Learn more about valence shell:https://brainly.com/question/7871741
#SPJ1
answer for the rate please help me with my chemistry homework thank you so much
Answers
Answer:
Rate cup 1: 36.00 tsp/h.
Rate cup 2: 59.50 tsp/h.
Rate cup 3: 70.13 tsp/h.
Explanation:
Based on the given example, the units must be in tsp/hour. To do this we just have to divide tsp by seconds and then convert it to hours remembering that 1 hour equals 3600 seconds.
Let's calculate each case:
- Cup 1: 1 tsp, 1 minute 40 seconds. Remember that 1 minute equals 60 seconds, so 1 minute and 40 seconds equals 100 seconds. The calculation of the rate will look like this:
\(\frac{1\text{ tsp}}{100\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=36.00\frac{tsp}{h}.\)The rate of cup 1 is 36.00 tsp/h.
- Cup 2: 2 tsp, 2 minutes 1 second. As we saw before 1 minute equals 60 seconds, so 2 minutes equals 120 seconds. 2 minutes and 1 second equals 121 seconds. The rate of cup 2 will be calculated as:
\(\frac{2\text{ tsp}}{121\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=59.50\frac{tsp}{h}.\)The rate of cup 2 is 59.50 tsp/h.
- Cup 3: 3 tsp, 2 minutes 34 seconds. 2 minutes are the same that 120 seconds, so 2 minutes 34 seconds equals 154 seconds. The rate of cup 3 is calculated as follows:
\(\frac{3\text{ tsp}}{154\text{ s}}\cdot\frac{3600\text{ s}}{1\text{ h}}=70.13\frac{tsp}{h}.\)The rate of cup 3 is 70.13 tsp/h.
Brittany pedaled her bicycle quickly on a level surface. When she quit pedaling and cousted, the bicycle slowed and
came to a stop. What happened to the energy of the moving bicycle as it coasted to a stop!
A. It was given off due to friction,
B. It was reabsorbed into Brittany's joints and muscles.
C. It was stored in the bicycle wheels as potential energy,
D. It was transferred to the air in the form of visible light.
I WILL GIVE BRAINLIEST I PROMISE
Answers
what is the weight in grams of 1 mole of ammonium sulfate (NH4)2SO4
Answers
Answer:
The molar mass of one molecule of ammonium sulfate (NH4)2 SO4 132.14 grams per mole
Answer: 132.15 g
Explanation:
If this question is from a mastery test on Edmentum, I just took it and this was the correct answer
