Question

Which statement describes a chemical property of water?

Answer 1

The chemical description of water is H2O, which means, it is composed of 2 hydrogen atoms and 1 oxygen atom. The answer to this item is the fourth option, " It is clear and colorless." When water is added with calcium, clear, colorless bubbles are formed. This explains a reaction of water with acid. The following are additional facts about water properties: Density: 1 g/cm³ Boiling point: 100 °C Molar mass: 18.01528 g/mol Melting point: 0 °C Formula: H2O

Answer 2

Answer: first option, It reacts with sodium metal.

Explanation:

Chemical properties are those manifested only as part of a chemical reaction, which means that the composition of the molecules of water will change: some chemical bonds are broken and others are formed, transforming some pure substances (elements, like sodium, or compounds, like water) into one or more different pure substances.

Water has the ability to react with sodium metal for form sodium hydroxide and hydrogen gas, according to this reaction:

Na(s) + H₂O (l) → NaOH (aq) + H₂ (g).

The products formed have different composition and different physical and chemical properties than the reactants from which they originated from. This is what a chemical change means.

2) On the other hand, the melting point of 0°C, the density of about 1 g/mL, and that it is clear and colorless, are all physical properties, because they can be assesed without changing the composition of water.