9. Calculate the amount of 10 W/W% NaOH solution needed to precipitate all the copper 2+ ion present in a 60 L solution of concentration 100 mg copper ion/L.

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Sodium hydroxide (NaOH) reacts with copper 2+ ions (Cu2+) to form a poorly soluble copper hydroxide by the following reaction:
2NaOH + Cu2+ → Cu(OH)2↓ + 2Na+
The concentration of Cu2+ solution is 100 mg/L, meaning that there are 100 mg of copper ions present in 1 L of its solution. In...

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