Identify the following as either a chemical change or physicalchange, and provide evidence to support your answer:
1. Blue Cu(II) cations of the salt solution react with greenNi(II) cations of its salt solution to produce a turqouise coloredsolution
2. A blue Copper 2 cation is heater, and the salt color becamewhite and drops of a clear liquid were seen on the side of the testtube. When water was added, the solution turned blue. However, oncewater was evaporated through heating, the blue salt appearedagain.
3. A blueish-green cation is heater and gas appears and the saltof this cation turned nearly black.
Part B.
1. Describe a way you could determine if Pb 2+ had leaked intopublic water pipes, in which lead was used in the past to connectthe pipes.
2. Indicatre what would occur in the events that Pb 2+ hadindeed leaked into the water
3. Formulate the net ionic equation for a positive test
4. What would occur if there was no Pb 2+ in the water? Wouldthis allow us to conclude that there is definitely no Pb 2+ in thewater, or would there still be uncertainty? Explain
