Passage IV
Barium (Ba), calcium (Ca), magnesium (Mg), and strontium (Sr) exist in their compounds as M2+ ions (Mg2+, Ca2+, etc.). When solutions of these ions are mixed with solutions containing X2- ions (SO42- [sulfate], CO32- [carbonate], etc.), salts will precipitate (form a solid) if the combination of positive and negative ions forms an insoluble (not dissolving in solution) salt, MX:
M2+ (solution) + X2- (solution) → MX (solid)
The following table summarizes the results of combining various metal nitrate solutions of equal concentrations with various solutions containing X2- ions.
18. The addition of sulfuric acid to calcium nitrate results in "no reaction." In terms of what the chemist observes in the reaction beaker, "no reaction" takes place when:
Your Answer is
Correct Answer is J
Explanation
General knowledge questions.
When the acid is added to the salt solution, if no chemical reaction occurs, the color of the solution will not change and no precipitation will occur