Understanding pH and Acids

What defines a substance as an acid?

• It has a pH greater than 7.

• It is insoluble in water.

• It donates hydrogen ions.

• It accepts hydrogen ions.

What happens to the hydrogen ion concentration when H2SO4 dissociates completely?

• It remains the same.

• It triples.

• It doubles.

• It decreases.

Which button on a calculator is crucial for calculating pH?

• SIN

• COS

• EXP

• LOG

What is the pH of a solution with a hydrogen ion concentration of 1 * 10^-3 M?

• 3

• 5

• 7

• 9

If the hydrogen ion concentration is 1 * 10^-5 M, what is the pH?

• 1

• 7

• 3

• 5

How does the pH change if the first number in the concentration is 1?

• The pH equals the positive exponent.

• The pH is always 7.

• The pH is always 0.

• The pH equals the negative exponent.

What is the pH of a monoprotic acid solution with a molarity of 1.5 * 10^-4 M?

• 6.82

• 3.82

• 4.82

• 5.82

How do you adjust the hydrogen ion concentration for a polyprotic acid like H2SO4?

• Multiply by the number of hydrogen ions.

• Subtract the number of hydrogen ions.

• Divide by the number of hydrogen ions.

• Add the number of hydrogen ions.

What is the pH of a solution if the hydrogen ion concentration is 3 * 10^-4 M?

• 3.5

• 6.5

• 4.5

• 5.5

In a polyprotic acid problem, what should you do if there are three hydrogen ions dissociating?

• Add three to the concentration.

• Multiply the concentration by three.

• Subtract three from the concentration.

• Divide the concentration by three.