7. The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CACO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 180 mg CaCO3/L?if we consider that water contains only Ca2+ ions. a) 18 x 10-4mol/l O b) 18 x 10-5 mol/l O c) 18 x 10-6 mol/I O d) 18 x 10-7 mol/l

7. The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CACO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 180 mg CaCO3/L?if we consider that water contains only Ca2+ ions. a) 18 x 10-4mol/l O b) 18 x 10-5 mol/l O c) 18 x 10-6 mol/I O d) 18 x 10-7 mol/l

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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