When a solution of nitric acid is added to a to solution of calcium hydroxide, the salt formed has what formula?

Nitric acid and calcium hydroxide react to form calcium nitrate and water.

The molecular equation is as follows:

2HNO3 (aq) + Ca(OH)2 (aq)  = Ca(NO3)2 (aq) + 2H2O (l)

So the formula of calcium nitrate, the salt formed in this reaction is Ca(NO3)2 .

Water here seem to be the only real product. It is formed from the OH+  of the hydroxide and the H+ of the acid which combine to form two water molecules.

Calcium and Nitrate ions remain unchanged before and after the reaction and are thus known as spectator ions.

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.