Question
b. The student's lab manual says to mix some of his CaCl_(2) solution with an aqueous solution of sodium carbonate (Na_(2)CO_(3)) (8 points) i. What evidence of a chemical reaction would he expect to see?Explain your answer. (2
Answer
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Zane
Master · Tutor for 5 years
Answer
The student would expect to see the formation of a white precipitate, which is calcium carbonate (
). This occurs because calcium ions (
) from
react with carbonate ions (
) from
, resulting in the insoluble compound
.
Explanation
When calcium chloride (
) reacts with sodium carbonate (
), a precipitate of calcium carbonate (
) forms. This is visible as a white solid in the solution, indicating a chemical reaction.