Nacl(aq) agno3(aq) → agcl(s) nano3(aq) : nacl(aq) agno3(aq) \rightarrow agcl(s) nano3(aq) : blank h2so4(aq) 2 lioh(aq) → 2 h2o(l) li2so4(aq) : h2so4(aq) 2 lioh(aq) \rightarrow 2 h2o(l) li2so4(aq) : blank hcl(aq) (nh4)2s(aq) → h2s(g) 2 nh4cl(aq) : hcl(aq) (nh4)2s(aq) \rightarrow h2s(g) 2 nh4cl(aq) : blank mg(s) cu(no3)2(aq) → mg(no3)2(aq) cu(s) :

The question is incomplete, here is a complete question.

Categorize each reaction into types of chemical reactions.

(1)

(2)

(3)

(4)

Answer :

(1) Precipitation reaction

(2) Neutralization reaction

(3) Double-displacement reaction

(4) Single replacement reaction

Explanation :

(1) The balanced chemical reaction is:

This reaction is a precipitation reaction in which an insoluble salt formed when two aqueous solutions are combined.  The insoluble salt that settle down in the solution is known an precipitate.

(2) The balanced chemical reaction is:

This is a neutralization reaction in which an acid react with a base react to give salt and water as a product that means it reacts to give a neutral solution.

(3) The balanced chemical reaction is:

The given reaction is a double-displacement reaction in which the cation of two reactants molecule exchange their places to give two different products.

(4) The balanced chemical reaction is:

This reaction is a single replacement reaction in which the the more reactive element replace the less reactive element.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e