How to mix chemicals in kit



  1. Beth Dusch
  2. Science Kits
  3. Wednesday, 30 December 2015
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Experiments call for using pipette to add drops of potassium hexacyanoferrate solution. But can not find in the manual how to mix the dry potassium to make a liquid. Please explain.
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When diluting chemicals, always add the chemical to the water, not the other way around. In general, if you pour water on top of certain chemicals, a reaction can occur quickly causing the solution to splash back up at you. However, if you carefully add the chemical to the water, you can avoid this.

You may find it easier to create a larger volume of properly diluted solution and store it for use as needed.

As an example, let’s assume that you are starting with a household ammonia which is at an 8% solution. If you wanted to make a 4% solution from that, you would combine equal parts water and ammonia. By adding 25ml of ammonia (@ 8% by volume) to 25ml of water you would thus create a 4% solution.

Therefore, to reach a 3.4% solution, you would need to dilute the ammonia by a little more than half.

Once again, let’s assume that you are starting with an 8% ammonia solution. If 50 ml of ammonia solution is required, you would need to add 21ml of ammonia to 28ml of water. (3.4%/8% = .425 -> .425 x 50ml = 21.25ml, or approx. 21ml).

If you should have additional questions, please email
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