There is a complete ninth-grade experimental textbook Chemistry published by Shandong Education Publishing House (the first edition for teachers in July 2006).

1, potassium hydroxide can't react with iron oxide, because iron oxide can react with acid, but can't react with alkali;

2. No reaction. Generally, carbonate or silver nitrate can react with hydrochloric acid in junior high school, excluding magnesium sulfate;

3. Commonality of acids:

(1) reacts with alkali to form salt and water.

(2) Reacting with active metal to generate salt and hydrogen.

(3) reacting with metal oxide to generate salt and water.

(4) The acid reacts with some salts to form a new acid and a new salt.

(5) Acid discolors the acid-base indicator.

Commonality of alkali:

(1) discoloration of acid-base indicator

(2) reacting with acid to generate salt and water

(3) react with some nonmetallic oxides to produce salt and water.

(4) reacting with some salts to generate new alkali and new salt.

Commonality of salt:

(1) reacts with acid to form new acid and salt.

(2) reacting with alkali to generate new alkali and new salt

(3) reacting with salt to generate two new salts.

(4) React with some metals to generate new salts and new metals.

Pure junior high school