The Effect of Changing the Concentration of Hydrochloric Acid on the Rate of Its Reaction With Marble Chips

The Effect of Changing the Concentration of Hydrochloric Acid on the Rate of Its Reaction With Marble Chips

A reaction is when two particles (reactants) join to form a new

product or products . A rate is a measure of how fast or how slow

something is. Rate is a measurement of the change that happens in a

single unit of time. The rate of a chemical reaction is how fast the

reactants react. To find a rate of reaction you measure the amount

of product given off by the reaction in a unit of time .

In this piece of coursework I will be investigating whether the

concentration of hydrochloric acid alters the rate of reaction with

marble chips . In this experiment hydrochloric acid is added to

marble chips (calcium carbonate) . The two reactants collide with

each other the hydrochloric acid acts as a catalyst for the two

reactants which causes particles from the reactants to collide into

one another the higher the concentration of acid molecules the faster

the gas will be given off. The rate of reaction is increased by three

factors .

Ÿ Higher temperatures Temperature alters the rate of a reaction by

supplying the reactant particles with more energy, the more energy the

reactants have the faster they move around increasing they’re are

chance of bumping into one another and having a successful collision

Ÿ The greater the surface area of the reactants the more particles are

available for a successful collision.

Ÿ Concentration effects the rate of a reaction because the higher the

concentration of particles the greater the chance of a successful

collision.

The equation for this experiment is:

HCL+CACO3=CO2 (hydrochloric acid + calcium carbonate = carbon

dioxide)

To do this experiment I am going to get 10 grams of marble chip and

weigh them on scales I will then add the hydrochloric acid I add 50

ml of acid each time I am going to use 5 different molars of acid