You may need to review stoichiometry and limiting reagent concepts in your textb

Question

You may need to review stoichiometry and limiting reagent concepts in your textbook to complete this prelab and prepare for the quiz. What is the difference between a simple ion and a complex ion? Give an example (not listed in this experiment) of each. What do we typically call the portion of a synthetic reaction in which we are focused on isolating the pure compound from the reaction mixture? What determines the theoretical yield of any reaction? In the reaction: A + 2B rightarrow 3C + D If 93 g of and 85 g of B arc combined, which reactant is the limiting reagent, and what is the theoretical yield of C in grains? (MM(A) = 55 g/mole. MM(B) = 48 g/molc. MM(C) = 37 g/mol)

Explanation / Answer

Q1

simple ion --> an ion composed of just ONE atom

complex ion --> an ion composed of plenty aotms/molecule which is charged

example:

simple --> Li+, Cl-, etc...

complex --> NO3-, PO4-3

Q3

theoretical yield --> the sstoichiometric amounts calcualted based on the limiting reactant, that is, the reactant that will be consumed first

Q4.

calculate moles of all

mol A = mass/MW = 93/55 = 1.690

mol of B = mass/MW = 85/48 = 1.770

ratio is 1:2

so... clearly B is limiting

so

mol of B 1.770 --> 1.770/2 = 0.885 mol of A required

so...

B is limiting and theoretical yield of C:

0.885 mol of A --> 3*0.885 = 2.655 mol of C

mass = mol*MW = 2.655*37 = 98.235 g of C

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