Methane from aluminum carbide

Equipment Gas , 4 glass cylinders with flat-ground glass lids, hot plate Chemicals Aluminum carbide (F), NaOH (c = 0.05 mol / l) (Xi). How-to Put some aluminum carbide in the flask; the dropping funnel is filled with the dilute sodium hydroxide solution. Little by little sodium hydroxide solution is added to the carbide from… Continue reading Methane from aluminum carbide

Colorful Fire Recipes

The last days of the year are always super colorful, especially when it comes to fireworks. But how do all these different colors work? This is not about short-lived colored flames, which can be created by holding the appropriate salts in a Bunsen burner flame. Examples are copper (II) chloride (or alternatively a mixture of… Continue reading Colorful Fire Recipes

Fluorescein synthesis

Equipment Porcelain bowl or small beaker (50 ml), crucible tongs, Bunsen burner, beaker (400 ml), if available: UV lamp. Chemicals Resorcinol (Xi), phthalic anhydride (Xi), concentrated sulfuric acid (C), dilute sodium hydroxide solution (w = 5%, C), dilute hydrochloric acid (c = 0.1 mol / l, Xi), possibly ethanol (F). How-to A spatula tip each… Continue reading Fluorescein synthesis

Synthesis of phenolphthalein

The name phenolphthalein indicates that the substance is made from phenol and phthalic acid. Equipment Test tube, beaker (400 ml), pipettes, filter Chemicals Phenol (C), phthalic anhydride (Xn), concentrated sulfuric acid (C), sodium hydroxide solution (c=1 mol/l; C), hydrochloric acid (c=1mol/l; Xi). How-to The same amounts of phenol and phthalic anhydride are mixed in a… Continue reading Synthesis of phenolphthalein

Blood orange titration

Instead of an alcoholic solution of phenolphthalein (F), a dispensed solution of blood orange juice is used as an indicator. Blood oranges contain a special plant pigment. This pigment serves as an indicator. Equipment Erlenmeyer flask (250 ml), juicer, burette (50 ml), measuring cylinder (100 ml). Chemicals and materials Lemon (+red cabbage as an indicator),… Continue reading Blood orange titration

Blood and hydrogen peroxide

Hydrogen peroxide is produced in many reactions of oxygen in the blood. Since it’s toxic, the body has developed a great antidote. This is called catalase and is contained in the blood. You can do a nice experiment with it. Safety note: Hydrogen peroxide is explosive in high concentrations and when heated. Plus it’s corrosive.… Continue reading Blood and hydrogen peroxide

Sulfuric acid and sugar

Equipment: Beaker (100 ml, tall form), glass rod. Chemicals: Concentrated sulfuric acid (C), sucrose (table sugar). How-to: Fill a beaker two-thirds full with sucrose and place it on an acid-proof surface. Add 4 ml of water to it to accelerate the reaction. Now pour about 25 ml of concentrated sulfuric acid (C) evenly onto the… Continue reading Sulfuric acid and sugar

Melting sulfur

Solid matter that can be melted becomes thinner and thinner until it begins to boil and evaporate. You can try this on a piece of ice. Done? Now let’s see what happens if we melt sulfur. First, prepare a glass of cold water. You will need that soon. Then fill a test tube 1/3 full… Continue reading Melting sulfur

Sodium ferrioxalate crystal

Do you want to grow a beautiful green complex crystal? Then sodium ferrioxalate is the perfect salt to start with What you need: • Oxalic acid • Ferric chloride • Sodium hydroxide or Soda • Ph test paper • Distilled water Preparing the solution – Dissolve 50g of Oxalic acid in 300ml of distilled water… Continue reading Sodium ferrioxalate crystal

Blue Bottle Reaction

Blue Bottle Reaction

An amazing reaction that can do it in home with household chemicals. The main ingredient methylene blue can be bought from aquarium shops. Key Takeaways Methylene blue is a medication and dye. Also used in aquariums for prevention of fungal infection. It is a safe chemical(low concentrations). Sodium hydroxide is corrosive. Be careful when handing… Continue reading Blue Bottle Reaction