![]() It’s red like the iron-based hemoglobin complex that gives real blood its color, minus any injury. These ions form a red-colored iron(III) thiocyanate complex. The important players in the reaction are the Fe 3+ from the iron compound and the K + and SCN 2+ from the potassium thiocyanate. How the Fake Blood Chemical Reaction Worksīoth the iron(III) compound and potassium thiocyanate are soluble in water. Avoid long contact with the chemicals and don’t apply them near the eyes, nose, or mouth. Safety Info: The chemicals do irritate skin, so immediately rinse the affected area with water. It’s also popular for Halloween haunted houses. However, you see it all the time in television and movies when a character appears to cut their hand to make some unholy pact or uses a weapon for inflicting close-up harm to another character. Drawing the damp edge of the treated dull blade appears to cause a bloody injury.Īs you might guess, this demonstration isn’t for the squeamish and may be inappropriate in a classroom setting.Dip the dull edge of knife, axe, scythe (etc.) in the iron chloride solution.Dampen a paintbrush or cotton ball with the potassium thiocyanate solution and paint over the affected area.In the bloody knife chemistry trick, a butter knife (or even a spoon) coated with the iron chloride solution leaves a bloody trail across skin or another surface pre-treated with the potassium thiocyanate solution. But, goldenrod paper is yellow and the color change results from a pH indicator. Messages written on goldenrod paper also appear like blood. Write a message using the iron(III) solution.Coat paper using the potassium thiocyanate solution and let it dry.Dampen a cotton ball or dip a paintbrush into the iron(III) solution and swipe across the message to reveal it.Īlternatively, write a message in fake blood:.Write a message using the potassium thiocyanate solution as ink.The iron(III) solution reveals messages that appear written in blood. The potassium thiocyanate solution is a type of invisible ink. If desired, clear the solution with sodium fluoride.Instantly turn the liquid blood red by adding the iron(III) solution.Pour the potassium thiocyanate solution into a clear container.But, the fake blood chemical reaction works great, too. The usual “ water into wine” or “water into blood” chemistry demonstration uses a pH indicator. Here are three simple chemistry demonstrations featuring the fake blood chemical reaction: Water Into Blood Color Change Chemistry Demonstration If you like, dissolve a bit of sodium fluoride in water in a third container.Prepare a saturated potassium thiocyanate solution by stirring the solid into the water until no more dissolves. Add a few milliliters of water to a second container.If you like, add the chemical until you see a bit of solid at the bottom of the container and filter out the crystals using a paper towel or coffee filter. ![]() Stir in iron(III) chloride until no more dissolves. Add a few milliliters of water to a small container.Exact amounts are not critical, but saturated solutions yield the deepest color: Either mix the solutions and form a blood red complex or else paint a surface with the potassium thiocyanate solution and draw across it with the iron solution, instantly making “blood.” iron(III) chloride (FeCl 3) or iron(III) nitrate Īll you do is make aqueous (water-based) solution of the iron compound and potassium thiocyanate.If desired, use sodium fluoride to instantly decolorize the fake blood. Fake Blood Chemical Reaction Materialsįor this reaction, you need a water-soluble iron(III) compound and potassium thiocyanate. The reaction also finds use as a special effect in movies and television for simulating injuries. It’s a sensitive test for the presence of iron(III), plus it lends itself to three chemistry demonstrations that are particularly popular around Halloween. The fake blood chemical reaction is an eye-catching and useful chemical reaction that forms a blood red iron complex. The reaction leads to several interesting chemistry demonstrations. The fake blood chemical reaction forms iron(III) thiocyanate. This entry was posted on Septemby Anne Helmenstine (updated on September 30, 2021)
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |