The blue flocculent precipitate jumped out at the bottom of the test tube

The copper ions will no longer separate when meeting hydroxide

When the solution turns golden yellow because the iron is trivalent< /p>

The light green ferrous iron fascinates people

The calcium carbide secretly swims to generate acetylene gas

After ignited, it turns into an acetylene flame with a temperature of several thousands of dollars

Lime water dotted with white precipitate

Benzene does not change color easily when exposed to potassium permanganate

Be careful when adding nitro to toluene TNT

The iodine molecules in benzene are so beautiful in purple

This paves the way for extraction

The electrolyte of the electrolytic cell is electrified cathode and anode

The valence of the compound is High and low electrons are transferred

Refined copper, iron, zinc, manganese, nickel, chromium, aluminum, silver and tin

leaving the anode mud

Colorless phenolphthalein is shy and blushing in the face of alkali< /p>

Purple litmus slowly fades out when it encounters alkali blue

Acid, alkali and salt dissolve into water ions and dissociate

Acid, hydrogen and oxygen have a love triangle with metal

Sodium hydroxide is corrosive, deliquescent and tastes astringent

The common names of caustic soda and caustic soda can be found everywhere

It is widely used for refining petroleum and making desiccant

Hydrochloric acid is as transparent as water, irritating and has a sour smell

White mist curls up into small volatile droplets

Active metals, salts and metal oxides

Consider me as a verification Your foreshadowing

Sulfuric acid does not want to evaporate and is sticky and absorbs water

The wooden sticks were salvaged and dehydrated to become carbonized

Like the water that has been passed down from ancient times to corpses, it corrodes thousands of things.

You have a smile in your eyes

Dilute the concentrated sulfuric acid

Pour slowly along the wall of the container and stir while keeping your hands

The concentrated acid touches the skin Rinse immediately with plenty of water

Apply sodium bicarbonate for first aid

Glycerin moisturizes the skin and makes it smooth and delicate

Slaked lime should be added to the soil for a suitable pH level

See The acid red, alkali purple test paper is so beautiful

Your eyes are smiling