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Question

carboxyl group in an organic acid is weakly acidic. It can neutralize a base, OH^-_(aq). The general chemical equation for this neutralization is given below.



RCOOH + NaOH ® RCOONa + H₂O

If 20 mL of 1.0 mol/L methanoic acid is needed to neutralize 100 mL of sodium hydroxide, calculate the concentration of the sodium hydroxide. Assume that this is a strong acid and strong base type of neutralization.

Answer 1

Answer is 0.2 M

Both carboxylic acid and NaOH react in 1:1 ratio

Multiplying the the molarity and volume in liters of the carboxylic acid gives you 0.02 moles ( 1 X 0.02 liters)

Therefore the moles of NaOH should also be the same.

Then the molarity of NaOH is moles/liters = 0.02 moles/0.1 liter