All of the following statements are true of hard water EXCEPT
A) it contains calcium salts.
B) it contains iron salts.
C) it contains only Na⁺ and K⁺ ions.
D) it forms an insoluble scum with soap.
Correct Answer:
Verified
Q1: Soft water contains relatively large concentrations of
A)iron
Q2: Approximately what fraction of the earth's surface
Q4: Heat capacity is a measure of the
Q5: Rainwater is
A)slightly acidic because it reacts with
Q6: The dramatic temperature changes on the moon
Q7: Rivers constitute _ percent of the surface
Q8: Water commonly exists in large amounts in
Q9: The majority of fresh water is found
Q10: The water cycle acts to purify water
Q11: Lakes and oceans affect climate by moderating
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