There are many chemical experiments that primary school students can do at home, such as removing scale from hot water bottles and discoloring morning glory.

The specific operation method is as follows:

1, remove scale from hot water bottle.

Operating steps:

Step 1: Leave some hot water in the thermos, and then pour some white vinegar.

Step 2: Cover and shake it several times, then leave it for a while, and the scale can be removed.

? Simple and interesting scientific experiments reveal that acetic acid can react with insoluble calcium, magnesium salt and alkali in scale to generate soluble acetate, thus achieving the purpose of scale removal.

2, morning glory discoloration.

Experimental materials: morning glory, baking soda, white vinegar, water and glass.

Experimental steps:

Step 1: Pour some white vinegar into the glass.

Step 2: Pour some baking soda into another glass, add water and mix well.

Step 3: Put the morning glory into these two cups respectively, and you will find that the morning glory has turned into different colors.

The secret of simple and interesting scientific experiments;

Morning glory contains a pigment (anthocyanin), which will change color with the change of external pH value. White vinegar is acidic and the flowers turn red; Soda water is alkaline and flowers turn blue.