- D Biology classroomCIE A-level biology 9700How to carry out simple dilution and serial dilution?How to make a full marks table in P3?For online tutoring.
- Dilution Table Mixing chart. This page may be printed by our customers for their use Dilution Chart. Dilution Ration 1 to 4 1 to 5 1 to 10 1 to 12 1 to 15 1 to 20 1 to 32.
When you're thinking about dilution, it helps to simplify your actions into dilution factors. When we said the diluted coffee was
Dilution Table Mixing chart. This page may be printed by our customers for their use Dilution Chart. Dilution Ration 1 to 4 1 to 5 1 to 10 1 to 12 1 to 15 1 to 20 1 to 32 1 to 40 1 to 50 1 to 60 1 to 64 1 to 100 1 to 128 1 to 256: Oz. Per Gal 32 26 12 10 8 6 4 3 2 1/2 2 2 1 1 1/2. To Determine: Cost To Use.
Divide dilution into cost per gallon. Example: (1:128 dilution selling at $13.40 per gallon) $13.40 ÷ 129 =.1038 -or- 10.4¢ per diluted gallon. Please select the document or documents you would like from the list below. We appreciate your support of our products and hope that you find this service helpful to your clinical practice.
'1/10th as strong as the original'
that was a dilution factor. We could also have said
'the dilution factor was 1/10', or
'the dilution factor was 0.1'.
Here are a few more for you to try:
- 1 mL coffee + 4 mL water =
- 1 mL coffee + 9mL water =
- 1 mL + 99mL water =
As you've probably guessed, this works exactly the same whether you're talking about caffeine or meningicocci. Here's what a dilution factor of 0.01 looks like on the lab bench:
Notice that it really doesn't matter how much of the original stock you started with, as long as you had enough to put 1 mL into the new container. What matters is how much you transfer and how much water you add.
It's possible to write an algebraic expression for the dilution factor, but it's almost more trouble than it's worth, because it sounds so complex. But for what it's worth, the dilution factor for 1 mL stock + 99 mL water is:
amount transferred / total amount =
amount transferred / (amount transferred + amount water added) =
1 / (1+99) = 1/100 = 0.01.
Below is an applet to practice finding dilution factors, and also to determine how much water to add to achieve a given dilution. You should practice this until it is second nature!!
Serial Dilution Experiment
1 mL stock + mL water
Can you do it in your sleep? OK, then go on to the next page...
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How To Serial Dilution
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