How can we convert 25 percent of ammonia solution to 10 M?
25% ammonia solution means 25g Ammonia in 100ml of water. To
convert it into moles i.e for 1000ml solvent,
25x100=250
which means 250g of ammonia is present in 1000ml of water to
make a 25%solution. To convert it into molar solution we will
divide 250 by the molecular mass of ammonia i.e 17.
250/17= 14.71M
This means that 25% ammonia solution contains 14.71 moles of
ammonia.
Now we will use the formula
M1V1=M2V2
Let's say we want to make 10 molar solution in 500ml water.
Then,
M1=14.71
V1=?
M2=10
V2=500
Putting values in the above equation:
14.71xV1 = 10x500
V1 = 10x500 / 14.71 = 340ml
We will take 340ml of the 25% ammonia solution and make the
volume up to 500ml with water. This will be our 10 molar solution
of Ammonia.
