7. Which of the following is true about a solution with 1 x 109 hydroxide [OH-] ions? a) It contains 1 x 10 s hydrogen [H+], a pH of 5, and it is an acidic solution b) It has 1 x 10s hydrogen [H+] ions, a pH of 9 and It is a basic solution c) It has 1x109 hydroxide [OH-] ions, a pH of 9 and it is a basic solution d) It has 1 x10 hydroxide [OH-] ions, a pH of 7, and it is a neutral solution
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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 |
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?
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Part B
What conditions must be met in order for an aqueous solution to be called âneutralâ?
What conditions must be met in order for an aqueous solution to be called âneutralâ?
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. |
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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. |
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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 |
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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. |
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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 âneutralâ?
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. |