Engineering Board Exam Reviewer · Chemistry · medium

How many times more acidic is a solution with pH 3 than one with pH 5?

1. 100 times
2. 2 times
3. 10 times
4. 1000 times

Answer

A. 100 times

Solution

Each pH unit is a factor of 10 in [H+]: 102 = 100.

More Chemistry questions

1. A solution has a pH of 4. What is its hydrogen ion concentration?
2. What is the pH of a 0.005 M H2SO4 solution, assuming both protons dissociate completely?
3. What is the pH of a 0.05 M HCl solution?
4. What is the pH of a 0.01 M NaOH solution at 25 °C?
5. What is the pH of a 0.001 M HCl solution?
6. What is the osmotic pressure of a 0.1 M glucose solution at 25 ° C? (R = 0.08206 L· atm/mol· K)
7. What is the boiling point of a 0.5 m aqueous NaCl solution? Assume complete dissociation. (Kb of water = 0.512 ° C/m)
8. What is the freezing point of a 1 m aqueous solution of a nonelectrolyte (e.g., sugar)? (Kf of water = 1.86 ° C/m)
9. How many mL of 0.25 M NaOH are needed to neutralize 20 mL of 0.1 M H2SO4? (H2SO4 + 2 NaOH Na2SO4 + 2 H2O)
10. How many mL of 0.2 M NaOH are needed to neutralize 25 mL of 0.1 M HCl?

All Chemistry Reviewer questions