Given the reaction:
mg(s) + 2 agno3(> mg(no3)2(aq) + 2 ag(s)
which type of reaction is represented?
(1) single replacement (3) synthesis
(2) double replacement (4) decomposition

(1) single replacement

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus magnesium can easily lose electrons as compared to silver and result in the formation of magnesium nitrate and silver.

Double displacement is a chemical reaction in which ion exchange takes place.

Synthesis reaction is a chemical reaction in which two reactants combine to give a single product.

Decomposition is a chemical reaction in which one substance decompose to give two or more than two products.

the ratio of the conjugate base to the acid required to attain the desired ph.