A student mixes of NaOH with of H SO

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A student mixes

250.\,\text{mL}

of

1.00\,\text{M}

NaOH with

100.\,\text{mL}

of

0.70\,\text{M}

H

_2

SO

_4

. After the reaction

2\,\text{NaOH}(aq)+\text{H}_2\text{SO}_4(aq)\rightarrow \text{Na}_2\text{SO}_4(aq)+2\,\text{H}_2\text{O}(l)

is complete,

8.00\,\text{g}

of Na

_2

SO

_4

is collected. What mass of NaOH remains unreacted in the solution? (a)

7.2\,\text{g}

(b)

4.4\,\text{g}

(c)

0.0\,\text{g}

(d)

5.5\,\text{g}

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