Mass of filter paper Mass of filter paper Precipitating Calckum Phosphate NAME D
ID: 544236 • Letter: M
Question
Mass of filter paper Mass of filter paper Precipitating Calckum Phosphate NAME DATE PRELABORATORY ASSIGNMENT* 1. Provide the key term that corresponds to each of the following definitions. SECTION (a) the relationship of quantities (i.e., mass of substance or volume of gas) in a chemical reaction according to the balanced chemical equation refers to a precipitate containing impurities that are usually soluble the process of heating a precipitate in aqueous solution to develop larger (b) (c) particles that are the solution above a precipitate after insoluble particles separate from solution the solution that passes through filter paper in a filtration operation the amount of product experimentally obtained from a reaction the amount of product that is calculated from a given amount of reactant the actual yield compared to the theoretical yield expressed as a percent easier to filter and free of impurities (d) (e) (0) (g) (h) Key Terms: actual yield, coprecipitation, digestion, filtrate, percent yield, stoichiometry, supernate, theoretical yield 2. Why must you allow digestion of the precipitate before filtration? 3. What should be done if particles of precipitate appear in the filtrate? If Precip ite appeors in lyouhae to reeucle Le tup 4. What is the purpose of the rubber policeman on the stirring rod? 'sruird 5. Is it possible to obtain a percent yield of Ca3(PO4)2 that is greater than 100%? 6 What are major sources of experimental error?Explanation / Answer
Q1
a) stoichiometry relates all coefficients/mass in a reaction
b) coprecipitation will containe all solids
c) digestion will aid in precipitation with large moleules
d) solution above implies supernant
e) solution through filter is ctypically called the filtrate, since it has been filtered
f) the amount experimentally obtained is "actual yield"
g) the theoretical amount is that clauclated, theoretical yield
h) the % is the percent yield