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Date May 2011 Marks available 1 Reference code 11M.1.hl.TZ2.20
Level HL Paper 1 Time zone TZ2
Command term Deduce Question number 20 Adapted from N/A

Question

Sodium carbonate and hydrochloric acid react according to the equation below.

\[{\text{N}}{{\text{a}}_2}{\text{C}}{{\text{O}}_3}({\text{s)}} + 2{\text{HCl(aq)}} \to {\text{C}}{{\text{O}}_2}({\text{g)}} + 2{\text{NaCl(aq)}} + {{\text{H}}_2}{\text{O(l)}}\]

Which conditions will produce the fastest initial rate with 2.0 g of powdered sodium carbonate?

A.     \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of \({\text{1.0 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) hydrochloric acid at 323 K

B.     \({\text{50 c}}{{\text{m}}^{\text{3}}}\) of \({\text{2.0 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) hydrochloric acid at 323 K

C.     \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of \({\text{1.0 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) hydrochloric acid at 348 K

D.     \({\text{50 c}}{{\text{m}}^{\text{3}}}\) of \({\text{2.0 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) hydrochloric acid at 348 K

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Core » Topic 6: Chemical kinetics » 6.1 Collision theory and rates of reaction
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