Soalan Chapter 8 Chemistry : Salt

1. . A student prepare copper (II) nitrate, Cu(NO₃)₂ by reacting copper(II) oxide, CuO with 100cm³ of

     1.5 mol dm^-3 nitric acid, HNO₃. Calculate the mass of cupper(II) oxide, CuO needed to react completely with the acid. [Relative atomic mass: Cu,64; O,16]

2.  A salt can be prepared by reacting an acid with a reactive metal. What is the mass of magnesium chloride that can be prepared by adding excess magnesium to 50cm³ of 2.0 mol dm^-3 hydrochloric acid?

      [Relative atomic mass: Mg, 24; Cl, 35.5]

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