1.a corrosion technologist pipetted a 100.00 ml hard water, Ask an Expert

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1. A corrosion technologist pipetted a 100.00 mL hard water sample and titrated it with 37.64 mL of 0.01 M EDTA solution for a total hardness endpoint, and 29.32 mL of 0.01 M EDTA solution for a calcium endpoint. Calculate the concentration of magnesium and calcium in ppm. Record your answers as ppm Mg2+, and Ca2+ espectively. For each answer indicate the ppm as CaCO3 also.

2. Write and balance the reaction between the magnesium ion, the bicarbonate ion and heat.

3. Write and balance the scale removal reaction involving the scale generated in question #2 with HCl.

4. In a sour water system (H2S) there is an opportunity for ferrous sulphide to form along with the calcium and magnesium carbonate scales. If acidizing is used to clean away scales, what danger exists? Indicate this by using a balanced reaction.

5. In the field, where the scale in question #4 is removed by acidizing, what precautions should be taken?

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Category:- Chemistry
Reference No.:- M9454911

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