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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:

150.000 g

Explanation:

The law of conservation of mass states that the mass of reactants and products of a reaction must be equal to one another.

In other words, for this case:

  • Mass of KOH + Mass of HCl = Mass of Products

We are given all required data to calculate the mass of the KOH solution:

  • Mass of KOH + 250.000 g = 400.000 g
  • Mass of KOH = 150.000 g

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