Problem: Formic acid is a weak acid and hydrochloric acid is a strong acid. It follows that the:This question has multiple correct optionsa. [OH-] of 0.01 M HCl(aq) will be less than that of 0.01 M HCOOH(aq)b. solution containing 0.1 M NaOH(aq) and 0.1 M HCOONa(aq) is a buffer solutionc. pH of 10-9 M HCl(aq) will be approximately 7 at 25°Cd. pH of a solution formed by mixing equimolar quantities of HCOOH and HCl will be less than that of a similar solution formed from HCOOH and HCOONa

FREE Expert Solution

We're being asked to determine which among the given statements are correct given that:

Formic acid is a weak acid and hydrochloric acid is a strong acid


Weak acids are weak electrolytes that don’t completely ionize but instead reach a state of equilibrium. 

Strong acids are considered strong electrolytes. They completely dissociate into ions when dissolved in water.


Let's take a look at each statement given:

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Problem Details

Formic acid is a weak acid and hydrochloric acid is a strong acid. It follows that the:
This question has multiple correct options

a. [OH-] of 0.01 M HCl(aq) will be less than that of 0.01 M HCOOH(aq)

b. solution containing 0.1 M NaOH(aq) and 0.1 M HCOONa(aq) is a buffer solution

c. pH of 10-9 M HCl(aq) will be approximately 7 at 25°C

d. pH of a solution formed by mixing equimolar quantities of HCOOH and HCl will be less than that of a similar solution formed from HCOOH and HCOONa

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Buffer concept. You can view video lessons to learn Buffer. Or if you need more Buffer practice, you can also practice Buffer practice problems.