How many liters of 0.200 M NaOH solution are required to completely react with 1.00 L of 0.100 M HCN solution to produce sodium cyanide and water?
A)0.25 L
B)0.50 L
C)1.00 L
D)1.50 L
E)2.00 L

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction is:
NaOH + HCN → NaCN + H2O
The stoichiometry of the reaction is 1:1 for NaOH and HCN.
To completely react with 1.00 L of 0.100 M HCN, we need:
0.100 mol/L x 1.00 L = 0.100 mol of HCN
Since the stoichiometry is 1:1, we need 0.100 mol of NaOH to react with 0.100 mol of HCN.
The volume of 0.200 M NaOH required to obtain 0.100 mol of NaOH is given by:
0.100 mol/0.200 mol/L = 0.50 L
Therefore, the answer is B) 0.50 L of 0.200 M NaOH solution.

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