Chemistry A H032: Practical skills Topical Past Paper Questions
OCR AS Chemistry A (H032) past-paper questions on Practical skills, free. This topic is frequently examined across 5 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Aqueous hydrogen peroxide, $ H_{2}O_{2} $(aq), gradually decomposes to produce water and oxygen. $$ \mathrm{2H_{2}O_{2}(aq) \rightarrow 2H_{2}O(l) + O_{2}(g) } \quad \Delta H=-196\mathrm{kJ} \mathrm{mol^{-1}} \quad \mathrm{Equation} \quad 4.1 $$ The rate of decomposition of $ H_{…
This question is about the enthalpy change of combustion of alcohols. (a) Explain the term enthalpy change of combustion. [2] (b) A student carries out an experiment to determine the enthalpy change of combustion, $ \Delta_{c}H $, of butan-1-ol, $ CH_{3}CH_{2}CH_{2}CH_{2}OH $. Th…
A student investigates the rate of reaction between strontium and water. $$ \mathrm{S r(s)~+~2H_{2}O(l)~\rightarrow~S r(O H)_{2}(a q)~+~H_{2}(g)} $$ The student's method is shown below. Pour 100 cm³ of water into a conical flask. • Add 0.26g of strontium and quickly connect a 100…
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