Multiple Choice
Hard water contains Mg2+ and Ca2+ ions and tends to form a ring in a bathtub due to its reaction with the soluble anions in soap. The formation of this insoluble material is an example of __________
A) an acid-base reaction.
B) a precipitation reaction.
C) a redox reaction.
D) a bathochromic shift.
E) bad housekeeping.
Correct Answer:

Verified
Correct Answer:
Verified
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