After 0.6523 g of is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.
grams water in the sample is
0.6523-0.3423 = ??
%H2O = [mass water/mass sample] x 100 = ??
To calculate the percentage of H2O in the hydrate, we need to determine the mass of water lost during heating.
Given:
Mass of the original hydrate (before heating): 0.6523 g
Mass of the residue (after heating): 0.3423 g
To calculate the mass of water lost, subtract the mass of the residue from the mass of the original hydrate:
Mass of water lost = Mass of original hydrate - Mass of residue
= 0.6523 g - 0.3423 g
= 0.310 g
Next, to calculate the percentage of H2O, divide the mass of water lost by the mass of the original hydrate and multiply by 100:
% H2O = (Mass of water lost / Mass of original hydrate) x 100
= (0.310 g / 0.6523 g) x 100
≈ 47.5 %
So, the hydrate contains approximately 47.5% H2O.