Question

Explain the reaction of bases with metals with an example​

Answer 1

Answer:

When alkali (base) reacts with metal, it produces salt and hydrogen gas. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal. Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

Answer 2

Reaction of bases with metals:

Some metals react with bases to form salts and hydrogen gas.

Metal + Base ---> Salt + Hydrogen gas

For example,

Aluminium is a metal and sodium hydroxide is a base. When aluminium is heated with sodium hydroxide, then sodium aluminate (salt) along woth hydrogen gas is formed.

Word Equation:

Sodium hydroxide + Aluminium ---> Sodium aluminate + Hydrogen

Chemical Equation:

NaOH + Al ---> $NaAlO_{2} + H_{2}$

Zinc also reacts with sodium hydroxide to form salts and hydrogen gas.

☆NOTE: All metals don't react with bases to produce hydrogen gas.

How will we know that hydrogen gas is produced in the reaction of between metals and bases?

Just bring a burning matchstick near the test tube where the solution of a metal and a base is there. We will observe that the gas produces a pop sound on bringing the matchstick near the mouth of the test tube. This indicates that the gas produced is hydrogen gas.