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What volume of 0.130 M HCl is required for the complete neutralization of 1.30 g of NaHCO3 (sodium bicarbonate)?

Sagot :

Answer: Volume required is 0.115 L or 115 ml

Explanation:

moles of [tex]NaHCO_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.30g}{84g/mol}=0.015mol[/tex]

The balanced chemical equation is:

[tex]HCl+NaHCO_3\rightarrow NaCl+H_2CO_3[/tex]

1 mole of [tex]NaHCO_3[/tex] requires = 1 mole of HCl

Thus 0.015 mol of [tex]NaHCO_3[/tex] requires = [tex]\frac{1}{1}\times 0.015=0.015[/tex] mole of HCl

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in L

[tex]0.130=\frac{0..015}{V_s}[/tex]

[tex]V_s=0.115L[/tex]

Thus volume required is 0.115 l or 115 ml

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