Aim. To find the identity of X(OH)2 (a group II metal hydroxide) by determining its solubility from a titration with 0.05 mol dm-3 HCL

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

You can view all our essays on Chemistry that have been Marked by Teachers

The first 200 words of this essay...

To find the identity of X(OH)2 (a group II metal hydroxide) by determining it's solubility from a titration with 0.05 mol dm-3 HCL

Theory:1.

Titrations are the reaction between an acid solution with an alkali. In this reaction (called neutralization), the acid donates a proton (H+) to the alkali (base). When the two solutions are combined, the products made are salt and water.

For example:

2HCl(aq) + X(OH)2 (aq) XCl2 (aq) + 2H2O (l)

This shows the one of the products i.e. salt being XCl2 and water.

So titration therefore helps to find the concentration for a solution of unknown concentration. This involves the controlled addition of a standard solution of known.

Indicators are used to determine, at what stage has the solution reached the 'equivalence point'(inflextion point). This means at which, does the number of moles base added equals the number of moles of acid present. i.e. pH 7

Titration of a strong Acid with a Strong Base:

As shown in the graph, the pH goes up slowly from the start of the tiration to near the equivalence point. i.e (the beginning of the graph).