1.What is water? (2)2.Define hardness of water. Is the sea water hard? Explain (4)3. What are the salts responsible for carbonate and non-carbonate hardness of water?(2)4.Name a chemical that can be used in a laboratory to test for the presence of water (2)5.What colour change is noticed in this test for water?(2)6.Some elements form compounds that dissolve in water to cause hardness. Name an element whose compounds dissolve in water to cause hardness(2)7.How can hardness be removed from water. Motivate your answer with a diagram (5)8.An analysis of drinking water showed that it contains 0.02 grams of chlorite per 700mL of water. Does this exceed the EPA drinking water standard?(5) 9.How did this chemical contaminant enter the drinking water? (6)

1.What is water? (2)2.Define hardness of water. Is the sea water hard? Explain (4)3. What are the salts responsible for carbonate and non-carbonate hardness of water?(2)4.Name a chemical that can be used in a laboratory to test for the presence of water (2)5.What colour change is noticed in this test for water?(2)6.Some elements form compounds that dissolve in water to cause hardness. Name an element whose compounds dissolve in water to cause hardness(2)7.How can hardness be removed from water. Motivate your answer with a diagram (5)8.An analysis of drinking water showed that it contains 0.02 grams of chlorite per 700mL of water. Does this exceed the EPA drinking water standard?(5) 9.How did this chemical contaminant enter the drinking water? (6)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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