`a.`

acid: `H_2SO_4,H_3PO_4,HCl,CH_3COOH`

base: `Al(OH)_3,NaOH,Ba(OH)_2, Ca(OH)_2, Fe(OH)_3`

oxide : `CO_2,CaO,Fe_3O_4`

`b.` 

`Al(OH)_3:` aluminium hydroxide

`H_2SO_4:` sulfuric acid

`NaOH:` sodium hydroxide

`Ba(OH)_2:` barium hydroxide

`H_3PO_4:`phosphoric acid

`CO_2:` carbon dioxide

`Ca(OH)_2:` calcium hydroxide

`CaO:` calcium oxide 

`HCl:` chloric acid

`Fe(OH)_3:` iron (III) hydroxide 

`CH_3COOH:` acetic acid

`Fe_3O_4:` iron (II,III) oxide 

`c.` 

`-` dd acid làm quỳ tím hóa đỏ: `H_2SO_4,H_3PO_4,HCl,CH_3COOH`

`-` dd base làm quỳ tím hóa xanh: `NaOH,Ba(OH)_2,Ca(OH)_2`

Giải thích các bước giải:

⭐

`a).`

`***` Acid:`H_2SO_4;H_3PO_4;HCl;CH_3COOH`

`***` Base:`Al(OH)_3;NaOH;Ba(OH)_2;Ca(OH)_2Fe(OH)_3`

`***` Oxide:`CO_2;CaO;Fe_3O_4`

`b).`
`1. Al(OH)_3 -` Aluminium hydroxide
`2. H_2SO_4 -` Sulfuric acid
`3. NaOH -` Sodium hydroxide
`4. Ba(OH)_2 -` Barium hydroxide
`5. H_3PO_4 -` Phosphoric acid
`6. CO_2 -` Carbon dioxide
`7. Ca(OH)_2 -` Calcium hydroxide
`8. CaO -` Calcium oxide
`9. HCl -` chloric acid
`10. Fe(OH)_3 -` Iron(III) hydroxide
`11. CH_3COOH -` Acetic acid
`12. Fe_3O_4 -` Iron(II,III) oxide

`c).`

`***` dd acid làm quỳ tím hóa đỏ

`***` dd base làm quỳ tím hóa xanh

$\bullet$  `overline{\text{Attack on Westalis}} .`