Chemical slogan of c h o n

(1)① ion representation: in the upper right corner of the symbol representing the ion, mark the number of positive and negative charges carried by the ion. When there is 1 charge when the number comes first and the sign comes last, 1 should be omitted. If multiple ions are represented, add the corresponding numbers before their ion symbols. Three sodium ions can be expressed as: 3 na+.

(2) Representation method of ions: In the upper right corner of the symbol of elements representing ions, mark the number of positive and negative charges carried by ions, with the number in front and the positive and negative symbols behind. If there are 1 charges, 1 should be omitted. If multiple ions are represented, add the corresponding number before the element symbol; Therefore, two ammonium ions are expressed as: 2nh4+.

③ Acetic acid is an organic acid with the chemical formula: ch3cooh.

The chemical formula of baking soda is sodium bicarbonate, and its chemical formula is:

(2)① Sulfuric acid reacts with sodium hydroxide solution to generate sodium sulfate and water, which belongs to neutralization reaction. The chemical equation of the reaction is: 2NaOH+H 2 SO 4 =Na 2 SO 4 +2H 2 O (reasonable).

② Test carbon dioxide gas with limewater. Carbon dioxide reacts with calcium hydroxide to produce calcium carbonate precipitate and water. The chemical equation of the reaction is: CO 2+Ca (OH) 2 = CaCO 3 ↓+H2O.

So the answer is: (1)13Na+; ②2NH 4+； ③CH 3 COOH； (4) sodium bicarbonate;

(2)①2 NaOH+h2so 4 = na2so 4+2H 2o； ②CO 2 +Ca(OH) 2 =CaCO 3 ↓+H 2 O。