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(Choose all that are correct) Which of these statement(s) is/are correct about pH?

The pH of a neutral solution is 7, which means that the concentration of the H+ ions is equal to the concentration of the OH- ions.
If a solution has 10-5 M/L OH- ions, the pH of the solution is 5
If a solution has a pH of 8, the H+ concentration is less than the OH- concentration
In a water solution, the exponents of the H+ concentration and the OH- concentration must add up to 10.
If you know the pH, you can calculate the Hydrogen ion concentration
pH is defined as the concentration of Hydrogen ions

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019
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Related questions

what is the ph of a solution with a hydroxyl ion concentrationof 10-10?

Explain what happens to the concentration of hydrogen ions inan aqueous solution when you add a base and cause the concentrationof OH- to rise to 10 to the -3. What is the pH of thesolutio?

Part A

Which answer is a true statement about pH values?

Part A

Which answer is a true statement about pH values?

Which answer is a true statement about pH values?

SubmitHintsMy AnswersGive UpReview Part

Part B

What conditions must be met in order for an aqueous solution to be called “neutral”?

What conditions must be met in order for an aqueous solution to be called “neutral”?

Pure water has a pH of 0.
pH is important in life mainly because it affects the cohesion of water.
A high pH corresponds to a high H+ concentration.
Stomach juice has a high pH.
None of the above.

SubmitHintsMy AnswersGive UpReview Part

Part C

Factory smoke has led to acid rain that lowered the pH of a lake to 5.0. What is the H+ concentration in the lake?

Factory smoke has led to acid rain that lowered the pH of a lake to 5.0. What is the H+ concentration in the lake?

The hydronium ion concentration is greater than the hydroxide ion concentration.
The concentrations of hydronium and hydroxide ions are equal.
There are no hydronium or hydroxide ions present in the solution.
The hydroxide ion concentration is greater than the hydronium ion concentration.
None of the above.

SubmitHintsMy AnswersGive UpReview Part

Incorrect; One attempt remaining; Try Again

No, there's a power-of-ten relationship between the pH and the concentration. Maybe you should review the lesson.

Part D

Your tank of swamp fish needs a pH of 5, and the pH is 7 at present. What should you do to the H+ concentration?

Your tank of swamp fish needs a pH of 5, and the pH is 7 at present. What should you do to the H+ concentration?

log (5) M
105 M
10-5 M
5%
5.0 M

SubmitHintsMy AnswersGive UpReview Part

Part E

In a washing machine, the detergent raised the pH to 9.0. The concentration of OH- in the solution is ...

In a washing machine, the detergent raised the pH to 9.0. The concentration of OH- in the solution is ...

Cut it in half.
Double it.
Reduce it to 1/100 of its present value.
Raise it to 100 times its present value.
Raise it to 200 times its present value.

SubmitHintsMy AnswersGive UpReview Part

Part F

Your tank of alkali fish needs a pH of 8, and the pH is 6 at present. What should you do to the H+ concentration?

Your tank of alkali fish needs a pH of 8, and the pH is 6 at present. What should you do to the H+ concentration?

Reduce it to 1/200 times its present value.
Double it.
Cut it in half.
Reduce it to 1/100 of its present value.
Raise it to 100 times its present value.
10-5 M
10-9 M
10-1 M
5 M
Can't tell without more information.

Part B

What conditions must be met in order for an aqueous solution to be called “neutral”?

Pure water has a pH of 0.
pH is important in life mainly because it affects the cohesion of water.
A high pH corresponds to a high H+ concentration.
Stomach juice has a high pH.
None of the above.

Part C

Factory smoke has led to acid rain that lowered the pH of a lake to 5.0. What is the H+ concentration in the lake?

The hydronium ion concentration is greater than the hydroxide ion concentration.
The concentrations of hydronium and hydroxide ions are equal.
There are no hydronium or hydroxide ions present in the solution.
The hydroxide ion concentration is greater than the hydronium ion concentration.
None of the above.

Your tank of swamp fish needs a pH of 5, and the pH is 7 at present. What should you do to the H+ concentration?

log (5) M
105 M
10-5 M
5%
5.0 M

Part E

In a washing machine, the detergent raised the pH to 9.0. The concentration of OH- in the solution is ...

In a washing machine, the detergent raised the pH to 9.0. The concentration of OH- in the solution is ...

Cut it in half.
Double it.
Reduce it to 1/100 of its present value.
Raise it to 100 times its present value.
Raise it to 200 times its present value.

SubmitHintsMy AnswersGive UpReview Part

Part F

Your tank of alkali fish needs a pH of 8, and the pH is 6 at present. What should you do to the H+ concentration?

Reduce it to 1/200 times its present value.
Double it.
Cut it in half.
Reduce it to 1/100 of its present value.
Raise it to 100 times its present value.
10-5 M
10-9 M
10-1 M
5 M
Can't tell without more information.

For each statement below, indicate whether it is True orFalse.

1. Breaking the hydrogen bond between two water molecules is calleddissociation. True False
2. When water dissociates, an oxygen atom separates from the restof the molecule. True False
3. The hydroxide ion has an overall charge of-1. True False
4. A hydrogen ion is the same as a proton.True False
5. When a hydrogen ion separates from a water molecule, it usuallycombines with another water molecule to form a hydronium ion.True False
6. A hydronium ion has the formula H2O+.True False
7. In pure water, at 25OC, about 10% of the watermolecules are dissociated at any given time.True False
8. In pure water, the concentration of hydrogen ions always equalsthe concentration of hydroxide ions.True False
9. In pure water, the concentration of hydrogen ions is 1 x107 molar. True False
10. Water dissociates into oppositely charged ions.True False

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