Mass of Al wire before reaction = 3.96 g Mass of Al wire after reaction = 3.65 g

Mass of Al lost = 0.31 g

Moles of Al lost = 0.011 moles

Mass of Pb + filter paper = 4.26 g

Mass of filter paper = 0.92 g

Mass of Pb = 3.34 g

Moles of Pb formed = 0.016 moles

Recall that there were 100 mL of solution. 0.016 moles of Pb were removed from the solution.
What was the [Pb+2] for the saturated solution of PbCl2?

Recall that there was 100 mL of solution. 0.016 moles of Pb were removed from the solution. Also recall the original equilibrium:

PbCl2(s) Pb+2(aq) + 2(Cl-)(aq)

Since there are 2 Cl ions formed for every Pb ion, what was the [Cl-] for the saturated solution of PbCl2?
M

2b2t

explanation:

2b2t

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l