Chemistry

Solutions and pH Chemistry

451 Questions

Solutions and pH chemistry focus on the acidity or alkalinity of various substances, from human urine to acidic soils. Questions involve titration calculations, molarity determination, and understanding mole fractions. This topic is a staple in the chemistry sections of state and national level competitive exams.

Calculating solution molarityMole fraction calculationpH value interpretationAcidic soils and pHTitration and neutralization

Solutions and pH Chemistry Questions

Multiple choice

the neutral value on the pH scale is

  1. less then 7

  2. equal to 7

  3. Greater than 7
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On the standard pH scale at 25 degrees Celsius, a pH of 7 indicates that the concentration of H+ ions equals the concentration of OH- ions, which is the definition of a neutral solution.

Multiple choice

Bleach has a pH of 13. Bleach is a(n)

  1. Acid

  2. Base

  3. Salt(neutral)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pH scale ranges from 0 to 14. Substances with a pH greater than 7 are considered basic (alkaline).

Multiple choice

Milk has a pH of 6.5. Milk is a(n)

  1. Acid

  2. Base

  3. Salt(neutral)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A pH of 6.5 is slightly less than 7, making milk slightly acidic. While very close to neutral, it is classified as an acid.

Multiple choice

The pH is the measure of

  1. Hydrogen(H+) in a solution

  2. Hydroxide(OH-) in a solution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

pH stands for 'potential of hydrogen' and is a measure of the concentration of hydrogen ions (H+) in a solution.

Multiple choice

Ammonia (11.0 pH) is

  1. a base

  2. an acid

  3. a salt

  4. neutral
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A pH of 11.0 is greater than 7, which indicates a basic solution.

Multiple choice

The further an acid is from 7.0 on the pH scale, the

  1. stronger the acid

  2. more neutral it is

  3. weaker the acid

  4. more likely it is to be a base
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pH scale is logarithmic; values further from 7 indicate higher concentrations of H+ ions, meaning a stronger acid.