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Unformatted text preview: 4 + H 2 O (not balanced) Also write the Net ionic Equation (3) Solutions of CuSO 4 and 2 equiv NaOH react to give a light blue precipitate Cu(OH) 2 . 0.499 g of Cu(OH) 2 is heated at 1000 o C to give a red solid A that weighs 0.316 g. This red solid A is an oxide of copper. When A is dissolved in H 2 SO 4 solution, another red solid in the elemental form that weighs 0.141 g is obtained. (a) Find out the (empirical) formula of A. Show your result based on calculations. (b) Write all the chemical equations involved. (4) A mixture of Na 2 O, NaOH, and Na 2 CO 3 that weighs 8.0 g only react with 20 g of 36.5% hydrochloric acid. All the solvent was removed after the reaction to give a solid. What is the mass of this solid? (5) Prove that the same mass of O 2 and O 3 contain equal number of oxygen atoms....
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This note was uploaded on 09/25/2008 for the course - - taught by Professor - during the Spring '08 term at Nanyang Technological University.
- Spring '08