Find out if concentration affects the rate of diffusion.

This essay hasn't yet been marked by one of our teachers

You can view 21 essays on Aqueous Chemistry that have been Marked by Teachers

The first 200 words of this essay...

Amber Vijayaratnam Tuesday 1st February 05

Investigation

Aim: To find out if concentration affects the rate of diffusion.

Prediction: I predict that the higher the concentration of acid the faster the reaction will be.

Hypothesis: Diffusion is the spreading out of a gas or liquid from an area of low concentration to another area where it has a lower concentration until the overall concentrations are balanced. The Hydrochloric acid (HCl) diffuses into the gelatine cube of which contains Sodium Hydroxide (NaOH), which is an alkali. When the Hydrochloric acid combines with the Sodium Hydroxide they form salt and water, which is neutral therefore turning the pink cube to clear.

Dependent variable: We are measuring the time taken for the pink indicator to turn clear when hydrochloric acid is added to it.

Independent variable: We are changing the molar of hydrochloric acid we are adding to the gelatine cubes. The molars range from 1-3.

Apparatus:

* 1 measuring cylinder

* 1 test tube

* 1 stop clock

* A large gelatine cube containing indicator and NaOH

* Hydrochloric acid ranging from 1-3 molars

*