A student reacts 2.00 g samples of CaCO₃ with excess dilute HCl(aq) and measures the…
CHEMISTRY · Single correct · A Level · Chemistry · Kinetics · Kinetics
Problem
A student reacts 2.00 g samples of CaCO₃ with excess dilute HCl(aq) and measures the time required to collect 40.0 mL of CO₂(g) at STP.
• Trial 1: marble chips (large pieces) — 2.5 min
• Trial 2: powdered CaCO₃ — 45 s
Assuming the same amount of gas is produced in each trial, the average rate of CO₂ generation in Trial 2 is approximately how many times the average rate in Trial 1?
(a) 5.6 times as fast
(b) 0.30 times as fast
(c) 3.3 times as fast
(d) 2.7 times as fast