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23-08-2022
Chemistry

Answered

Water "softeners" remove metal ions such as Ca²⁺ and Fe³⁺ by replacing them with enough Na⁺ ions to maintain the same number of positive charges in the solution. If 1.0X10³ L of "hard" water is 0.015 M Ca²⁺ and 0.0010 M Fe³⁺, how many moles of Na⁺ are needed to replace these ions?

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