a beaker contains a solution of calcium hydroxide (ca(oh)₂) in water. a student places a straw in the beaker…

a beaker contains a solution of calcium hydroxide (ca(oh)₂) in water. a student places a straw in the beaker and then breathes into the solution through the straw. as the student breathes into the solution, a white precipitate forms. what is the most likely composition of the precipitate?\no h₂o\no caco₃\no ch₃oh\ndone

a beaker contains a solution of calcium hydroxide (ca(oh)₂) in water. a student places a straw in the beaker and then breathes into the solution through the straw. as the student breathes into the solution, a white precipitate forms. what is the most likely composition of the precipitate?\no h₂o\no caco₃\no ch₃oh\ndone

Answer

Explanation:

Step1: Identify exhaled gas

When breathing out, we exhale carbon - dioxide ($CO_2$).

Step2: Consider reaction with calcium hydroxide

$CO_2$ reacts with $Ca(OH)_2$ in the solution. The chemical reaction is $Ca(OH)_2 + CO_2=CaCO_3\downarrow + H_2O$.

Step3: Determine precipitate

The insoluble product in the reaction is calcium carbonate ($CaCO_3$), which forms the white precipitate.

Answer:

$CaCO_3$