To measure the amount of calcium carbonate (caco) in a seashell, an analytical chemist crushes a 2.100 g sample of the shell to a fine powder and titrates it to the endpoint with 119. ml of 0.300 m hydrogen chloride (hci) solution. the balanced chemical equation for the reaction is 2hci(aq) + co, (aq) ? h2co3(aq) + 2a (aq). what kind of reaction is this?

This is an example of double displacement reaction.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

The given chemical equation follows:

By Stoichiometry of the reaction:

2 moles of hydrochloric acid reacts with 1 mole of calcium carbonate to produce 1 mole of carbonic acid and 1 mole of calcium chloride.

Hence, this is an example of double displacement reaction.

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?