How would you make a dilution of 5%, 2%, 1% and 0.5% from a
Jul 16, 2014 19:27:22 GMT -5
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Post by Cyngbaeld on Jul 16, 2014 19:27:22 GMT -5
If you were going to make the diluted solutions directly from the 10% solutions, for 5% it would be a 1 in 2 dilution (ie, one part 10% solution + one part water). A 5% solution is half the strength of a 10% solution so you dilute 1 in 2.
For 2% solution, 2% is one-fifth of 10%, so it would a 1 in 5 dilution (one part 10% solution to 4 parts water, 5 parts total). For 1% solution, a 1 in 10 dilution, for 0.5% solution, a 1 in 20 dilution.
Percentage strength of the solution you are diluting from, divided by percentage strength of the solution you want, gives you the dilution factor.
So a 10% solution to 2% solution, = 10 divided by 2, = 5. So you need a 1 in 5 dilution. If you needed 100ml, you would take 20ml of your 10% solution and add 80ml of water. You end up with 100 ml, one part of which was 10% solution and 4 parts of which was water.
For 2% solution, 2% is one-fifth of 10%, so it would a 1 in 5 dilution (one part 10% solution to 4 parts water, 5 parts total). For 1% solution, a 1 in 10 dilution, for 0.5% solution, a 1 in 20 dilution.
Percentage strength of the solution you are diluting from, divided by percentage strength of the solution you want, gives you the dilution factor.
So a 10% solution to 2% solution, = 10 divided by 2, = 5. So you need a 1 in 5 dilution. If you needed 100ml, you would take 20ml of your 10% solution and add 80ml of water. You end up with 100 ml, one part of which was 10% solution and 4 parts of which was water.
