Answer:
B. 0.05
Explanation:
The reaction that takes place is:
As 1 mol of NaOH reacts with 1 mol of HCl, to solve this problem what we need to do is calculate the number of NaOH moles contained in 0.1 liters of a 0.5 M solution:
The moles of Hydrogen chloride required to neutralize the 0.1 liter of 0.5 M Sodium hydroxide is 0.05 moles.
Moles (n) of any substance will be calculated by using the molarity (M) as:
M = n/V, where
V = volume
Given chemical reaction is:
NaOH +HCl → NaCl + H₂O
Moles of 0.5M NaOH will be calculated as:
n = (0.5)(0.1) = 0.05 moles
From the stoichiometry of the reaction it is clear that:
1 mole of NaOH = react with 1 mole of HCl
0.05 mole of NaOH = react with 0.05 mole of HCl
Hence option (B) is correct.
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