The rate of reaction between marble chips and hydrochloric acid can be increased by: a) increasing the concentration of the hydrochloric acid, b) increasing the temperature of the hydrochloric acid. Explain why in terms of the reacting particle model.(6)

(For a reaction to occur, reactant particles must collide and interact with each other in some way.The rate of a chemical reaction is proportional to the number of collisions between reactant molecules.)
Increasing the concentration of HCl increases the number of acid particles in the same volume of liquid. With more particles, there is an increased frequency of collisions. Therefore the rate of reaction increases with increased concentration.
Increasing the temperature of the acid increases the kinetic energy of each particle. When the acid particles move around faster, there is a greater chance of successful collisions between the acid and marble chips. Therefore rate of reaction increases because there are more collisions.

LE
Answered by Liz E. Chemistry tutor

26776 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

A student needs 0.2 moles of hydrochloric acid to conduct a reaction. How many milliliters of a 0.5 M HCl solution does the student need?


Calculate the enthalpy of formation of water.Is the reaction an exothermic or endothermic reaction?


Why is graphite softer than diamond if they are made up from the same covalently bonded carbon atoms?


In aqueous solution, sulphuric acid dissociates into ions in 2 stages. The pKa for the first dissociation is -3. Calculate the pH of a 0.025 mol dm-3 solution of sulphuric acid using the pKa value of the 1st dissociation.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning