- #1

physicsnobrain

- 123

- 0

## Homework Statement

Find the percent yield of alum

In an experiment to synthesize alum I started with 0.766g of aluminum and made 8.246g of alum

## Homework Equations

2Al + 6H20 + 2KOH ---> 2KAl(OH)4 + 3H2

## The Attempt at a Solution

First I find the LR. Which in this expirment is Al.

I find the moles of aluminum to be 0.02838mol, next I multiply by the mole ratio and by the molar mass of alum to find the theoretical yield of alum.

Now to find the percent yield I do actual/theoretical X100%

8.246g/3.806g x 100% = 217%. I know Im wrong because this is impossible.

What did I do wrong?