q: is it necessary to synthesize the various copper compounds in order to recove
ID: 853736 • Letter: Q
Question
q: is it necessary to synthesize the various copper compounds in order to recover copper metal? Why or why not? Procedure Throughout this experiment, record detailed observations of all colour changes and all appearances and disappearances of precipitates. Part A: Copper cycle Preparation of Cu(OH)2. Add 10. 0 mL of 0. 10 M Cu(NO3)2 solution to a 250 mL beaker. Then add 20. 0 mL of 2 M NaOH solution to the beaker and stir. Finally add enough distilled water to give a total volume in the beaker of about 100 mL.. Burner setup. This setup is pictured in Figure 1. Add a ring clamp to a stand and place a place a square of wire gauze on the ring. Adjust the height of the ring so that it will be 6 - 8 cm above the top of the chimney of your Bunsen burner. Attach your Bunsen burner to a gas valve using a tightly fitted hose. Turn on the gas valve and adjust flame by turning the chimney so that the flame is blue and has a lighter blue inner cone. Place the burner under the ring clamp so that the flame heats the centre of the wire gauze. Preparation of CuO After setting up and lighting the burner, place the beaker on the wire gauze and constantly stir the Cu(OH)2 suspension with a glass stirring rod while heating. Once the solution starts boiling keep heating for 1 minute then turn off the burner by returning the valve to the perpendicular position. Let this solution cool for at least 5-6 minutes before continuing, or you will burn your fingers! Do not put away the burner setup yet. Decant the supernatant liquid by holding the glass rod across the top of the beaker and slowly pouring the liquid out of the beaker while leaving the solid CuO in the beaker (see Figure 2).Explanation / Answer
Yes.
Copper obtained as ores and copper ores contains many metals like gold, silver, and other metals and also useless meterials.
Therefore, it is necessary to synthesis the copper metal as compounds to get pure copper metal.
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