How do you calculate the theoretical yield and percentage yield of a chemical equation?

Yo sup??

The theoretical yield will be given in the question.

To calculate the percentage yield use the formula

percentage yield=(observed yield/theoretical yield)*100

Hope this helps

Theoretical yield is the result obtained from your calculations.

Percentage yield is the ratio of the actual yield ( i.e yield obtained from your experiment) to theoretical yield x 100 i.e

%yield = Actual yield / Theoretical yield x 100

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g