Chemical cut II No chemists were injured ! II Making of artificial blood

Can you make a cut  on your hand without injury? It is possible to make a realistic fake blood using potassium thiocyanate and iron (III) chloride.These two react to form a blood red color
red complex, which looks like blood!

Reagents and equipment

1.Potassium thiocyanate

2.iron (III) chloride

3.Distilled water

4.Two beakers

5.cotton balls

6.Knife
7.Sodium fluoride

Procedure

1.Dissolve potassium  thoicyanate iron(III) chloride and sodium fluoride  in water taken three different beakers.stir well.

2.Soak a plastic knife  with iron (III) chloride solution.

3.Apply a little of potassium thoicyanate on the hand.

4.Carefully, without applying force,run the knife along the hand rubbed with potassium thiocyanate solution. A  red mark will appear on your hand which resembles like a bleeding out !

5.Now rub sodium fluoride on the hand,amazing the blood disappears ! 

Process

In the reaction between potassium thoicyanate and  iron (III) chloride a blood red colored complex,iron  thoicyanate(III). forms. It resembles blood.

FeCl3+3 KSCN→Fe(SCN)3+3KCl

               This complex react with sodium fluoride, the red color disappears.

         

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