Rates of Reaction

Rate of reactions The rate of reaction questions in this section should help you master this part of the course.

Question 1


The apparatus below was used to investigate the reaction between lumps of calcium carbonate and dilute hydrochloric acid.



Excess acid was used to make sure all the calcium carbonate reacted. A balance was used to measure the mass lost during the reaction.



















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<h2 class="MsoNormal" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:33.0pt;margin-bottom:.0001pt;line-height:99%;mso-pagination:none; mso-layout-grid-align:none;text-autospace:none">Question 2

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: normal; text-autospace: ; mso-pagination: none; mso-layout-grid-align: none;"><span style="font-family: "Times New Roman","serif";">Rates of Reaction <span style="font-family: "Times New Roman","serif"; font-size: 12pt;">

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<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 7pt 0pt 4pt; line-height: 92%; text-autospace: ; mso-pagination: none; mso-layout-grid-align: none; punctuation-wrap: simple;"><span style="font-family: "Times New Roman","serif";">An experiment was carried out to determine the rate of the reaction between hydrochloric acid and calcium carbonate chips. The rate of this reaction was followed by measuring the volume of gas released over a certain time.

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<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 10pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 10pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 10pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 19.9pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 33pt; text-align: justify; line-height: 99%; text-indent: -28.8pt; text-autospace: ; text-justify: inter-ideograph; mso-pagination: none; mso-layout-grid-align: none; punctuation-wrap: simple; mso-list: l1 level1 lfo1; tab-stops: list 33.0pt;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 33pt; text-align: justify; line-height: 99%; text-indent: -28.8pt; text-autospace: ; text-justify: inter-ideograph; mso-pagination: none; mso-layout-grid-align: none; punctuation-wrap: simple; mso-list: l1 level1 lfo1; tab-stops: list 33.0pt;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 33pt; text-align: justify; line-height: 99%; text-indent: -28.8pt; text-autospace: ; text-justify: inter-ideograph; mso-pagination: none; mso-layout-grid-align: none; punctuation-wrap: simple; mso-list: l1 level1 lfo1; tab-stops: list 33.0pt;"><span style="font-family: "Times New Roman","serif"; mso-fareast-font-family: "Times New Roman";"> (a)<span style="font: 7pt/normal "Times New Roman"; font-size-adjust: none; font-stretch: normal;">            <span style="font-family: "Times New Roman","serif";">Describe a different way of measuring volume in order to follow the rate of this reaction.

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 457pt; line-height: 99%; text-autospace: ; mso-pagination: none; mso-layout-grid-align: none;"><span style="font-family: "Times New Roman","serif";">(1) <span style="line-height: 99%; font-family: "Times New Roman","serif"; font-size: 12pt;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 0.1pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 33pt; text-align: justify; line-height: 99%; text-indent: -28.8pt; text-autospace: ; text-justify: inter-ideograph; mso-pagination: none; mso-layout-grid-align: none; punctuation-wrap: simple; mso-list: l0 level1 lfo2; tab-stops: list 33.0pt;"><span style="font-family: "Times New Roman","serif"; mso-fareast-font-family: "Times New Roman";"> (b)<span style="font: 7pt/normal "Times New Roman"; font-size-adjust: none; font-stretch: normal;">           <span style="font-family: "Times New Roman","serif";">What other variable could be measured to follow the rate of this reaction?

<p class="MsoNormal" style="margin: 0cm 0cm 0pt 457pt; line-height: 99%; text-autospace: ; mso-pagination: none; mso-layout-grid-align: none;"><span style="font-family: "Times New Roman","serif";">(1) <span style="line-height: 99%; font-family: "Times New Roman","serif"; font-size: 12pt;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 16.65pt; text-autospace: ; mso-line-height-rule: exactly; mso-pagination: none; mso-layout-grid-align: none;">

Question 3
<span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-theme-font: minor-fareast; mso-ansi-language: EN-GB; mso-fareast-language: EN-GB; mso-bidi-language: AR-SA;"> <span style="font-family: "Times New Roman","serif"; font-size: 12pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-theme-font: minor-fareast; mso-ansi-language: EN-GB; mso-fareast-language: EN-GB; mso-bidi-language: AR-SA;">