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please answer part A and B with an explanation 3. A sample of water contains 6.40ppmCa2+ and 11.3ppmAl3+, both of which contribute to water hardness.

please answer part A and B with an explanation

3. A sample of water contains 6.40ppmCa2+ and 11.3ppmAl3+, both of which contribute to water hardness. 3a. (1.5 pt) Calculate the hardness as meq/L. 3b. (1.5 pt) Calculate the hardness as ppm CaCO3

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