A student investigates the rate of reaction between marble chips (CaCO3\text{CaCO}_3CaCO3) and dilute hydrochloric acid (HCl\text{HCl}HCl) at 298 K:
CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g) \text{CaCO}_3(\text{s}) + 2\text{HCl}(\text{aq}) \rightarrow \text{CaCl}_2(\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{CO}_2(\text{g}) CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g)In the baseline experiment, 5.0 g of medium-sized marble chips are reacted with 50 cm3 of 1.0 mol dm−3 HCl1.0\text{ mol dm}^{-3}\text{ HCl}1.0 mol dm−3 HCl.
Which of the following changes to this experiment will increase the initial rate of reaction?
Replacing the 50 cm350\text{ cm}^350 cm3 of 1.0 mol dm−3 HCl1.0\text{ mol dm}^{-3}\text{ HCl}1.0 mol dm−3 HCl with 100 cm3100\text{ cm}^3100 cm3 of 1.0 mol dm−3 HCl1.0\text{ mol dm}^{-3}\text{ HCl}1.0 mol dm−3 HCl
Replacing the 5.0 g5.0\text{ g}5.0 g of medium-sized marble chips with 5.0 g5.0\text{ g}5.0 g of larger marble chips
Replacing the 50 cm350\text{ cm}^350 cm3 of 1.0 mol dm−3 HCl1.0\text{ mol dm}^{-3}\text{ HCl}1.0 mol dm−3 HCl with 25 cm325\text{ cm}^325 cm3 of 2.0 mol dm−3 HCl2.0\text{ mol dm}^{-3}\text{ HCl}2.0 mol dm−3 HCl
Performing the reaction in a larger volume conical flask
