What is the concentration if 100.0 g of calcium chloride is dissolved in water to make 850.0 cm^3 of solution? "molar mass of calcium chloride is 110.98"

We know that the formula for molarity is .

We are given 100g of , and the volume of water that is used is 0.850 L.

**Note:  = 1 mL, and there are 1000 mL in 1 L; thus, we have 0.850 L that we are dealing with in this solution.

They also give us the molar mass of , which helps us to determine the amount of moles that we are dealing with. Let's solve for how many moles of we have:

.

**Another Note: The reason that I put the grams on the bottom of the fraction is because we want the grams to cancel out so that we are then left with moles.

We now know that we are dealing with 0.90 moles of , and we have 0.850 L of water for this solution. We now have enough information to solve for the concentration:





The concentration of the solution is 1.06 M.

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.