For every experiment there will always be a margin of error due to human, mechanical and procedure errors. In this experiment there could have been errors in reading the balance and burette. The balance was used more than once, thus; increasing the margin of error. The zinc chloride could have been left on the burner too long or not long enough. The excess water left behind, from not leaving the evaporating dish on the burner …showed first 75 words of 270 total…

…showed last 75 words of 270 total…resulting in 2.13 grams of zinc chloride. The actual yield was obtained by subtracting the mass of the evaporating dish (42.43g) from the mass of the evaporating + zinc chloride resulting in an actual yield of 2.01g of zinc chloride. The purpose statement was supported by the stoichiometry problem because the difference of the theoretical and actual yield is so small that it is accounted for in the percent error; therefore, the experiment was successful. ------------------------------------------------------------------------ **Bibliography**