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A student performs an experiment similar to experiment 1 using hydrochloric acid (HCl) and potassium hydroxide...

A student performs an experiment similar to experiment 1 using hydrochloric acid (HCl) and potassium hydroxide (KOH). The mass of the hydrochloric acid solution is 250.000 g. After combining the HCl and KOH, the final combined mass is 400.000 g. Given what you have learned about the conservation of mass in this experiment, what must have been the mass of the KOH solution?

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Answer #1

mass of the hydrochloric acid solution = 250.000 g

After combining the HCl + KOH combined mass = 400.000 g

mass of KOH solution = combined mass of (KOH + HCl) - mass of HCl solution

                                   = 400 - 250

                                   = 150.000 g

mass of KOH solution = 150.000 g

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