Determine the concentration of the acid in mol/dm³.

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It looks like you've sent the same question again, Miriam! I'll re-provide the solution for part (d) from the previous problem.

d) Determine the concentration of the acid in mol/dm³.
Given:
Concentration of $\text{Na}_2\text{CO}_3$ ( $C_B$ ) = 0.1 M
Volume of $\text{Na}_2\text{CO}_3$ ( $V_B$ ) = 25 cm³ = 0.025 dm³
Volume of $\text{H}_2\text{SO}_4$ ( $V_A$ ) = 20 cm³ = 0.020 dm³

d) (i) Determine the concentration of the acid in mol/dm³.

Write the balanced chemical equation for the reaction.
$\text{H}_2\text{SO}_4(\text{aq}) + \text{Na}_2\text{CO}_3(\text{aq}) \longrightarrow \text{Na}_2\text{SO}_4(\text{aq}) + \text{CO}_2(\text{g}) + \text{H}_2\text{O}(\text{l})$
From the balanced equation, the mole ratio of $\text{H}_2\text{SO}_4 : \text{Na}_2\text{CO}_3$ is $1:1$ .
Calculate the moles of $\text{Na}_2\text{CO}_3$ used.
$\text{Moles of Na}_2\text{CO}_3 = C_B \times V_B$ $\text{Moles of Na}_2\text{CO}_3 = 0.1 \text{ mol/dm}^3 \times 0.025 \text{ dm}^3 = 0.0025 \text{ mol}$
Determine the moles of $\text{H}_2\text{SO}_4$ reacted.
Since the mole ratio is $1:1$ ,
$\text{Moles of H}_2\text{SO}_4 = \text{Moles of Na}_2\text{CO}_3 = 0.0025 \text{ mol}$
Calculate the concentration of $\text{H}_2\text{SO}_4$ .
$\text{Concentration of H}_2\text{SO}_4 = \frac{\text{Moles of H}_2\text{SO}_4}{\text{Volume of H}_2\text{SO}_4 (in dm}^3\text{)}$ $\text{Concentration of H}_2\text{SO}_4 = \frac{0.0025 \text{ mol}}{0.020 \text{ dm}^3}$ $\text{Concentration of H}_2\text{SO}_4 = \boxed{0.125 \text{ mol/dm}^3}$
d) (ii) The reaction is:
$\text{H}_2\text{SO}_4 + \text{Na}_2\text{CO}_3 \longrightarrow \text{Na}_2\text{SO}_4 + \text{CO}_2 + \text{H}_2\text{O}$

Determine the concentration of the acid in mol/dm³.

Step-by-step solution

Write the balanced chemical equation for the reaction.

Calculate the moles of $\text{Na}_2\text{CO}_3$ used.

Determine the moles of $\text{H}_2\text{SO}_4$ reacted.

Calculate the concentration of $\text{H}_2\text{SO}_4$ .

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Step-by-step solution

Write the balanced chemical equation for the reaction.

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Calculate the moles of $\text{Na}_2\text{CO}_3$ used.

Determine the moles of $\text{H}_2\text{SO}_4$ reacted.

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