A gas formation reaction

A gas formation reaction - • 2[H(aq Cl(aq → H 2 CO 3(aq...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
A gas-formation reaction is a type of reaction in which there is a formation of an insoluble or slightly soluble gas when there are no gaseous reactants. Displacement reactions in which an active metal displaces from an acid or from water are gas-formation reactions; they are not methathesis reactions. Consider hydrochloric acid with calcium carbonate to form carbonic acid. Formula Unit 2HCl (aq) + CaCO 3 (s) H 2 CO 3 (aq) + CaCl 2 (aq) Total Ionic
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • 2[H + (aq) + Cl-(aq) ] → H 2 CO 3 (aq) • + CaCO 3 (s) + [Ca 2+ (aq) + 2Cl-(aq) ] • Net Ionic • 2H + (aq) + CaCO 3 (s) → H 2 CO 3 (aq) + Ca 2+ (aq) • Enough heat is generated in the reaction to cause thermal decomposition of carbonic acid. • H 2 CO 3 (aq) → CO 2 + H 2 O (l) • The net effect of the chemical reaction and subsequent decomposition is • 2HCl (aq) + CaCO 3 (s) → CO 2 + H 2 O (l) + CaCl 2 (aq)...
View Full Document

Ask a homework question - tutors are online