# chemistry

1. How many grams of calcium chloride (CaCl2) are there in 600.0 mL of an aqueous solution that has a concentration of 0.450 M CaCl2?

2. The conjugate base of HS- is:

3. What mass of calcium chloride, CaCl2, is needed to prepare 3.65 L of a 1.75 M solution?
The molar mass of calcium chloride is 111.0 g/mol.

1. 1. mols CaCl2 = M x L = ?
Then grams = mols x molar mass

2. The base is what's left after the H is gone.

3. How many mols do you need? That's mols = M x L
How many grams is that many mols? That's grams = mols x molar mass = ?

posted by DrBob222
2. mxl=270
so the answer to 1. is 270?
so the answer to 2. is S2-?
so the answer to 3. is 6.3875?

posted by anna
3. 1. You forgot to change 600 mL to L. The answer is 0.270 mols.
2. is yes
M x L = 1.75 x 3.65 = ?
? x molar mass = ? x 111 = approx 710 grams.

posted by DrBob222
4. 1. is incorrect, it is not .270, i have one more chance on my practice sheet to answer this.

2. was good, thanks

posted by anna
5. You misunderstood on 1.
mols = M x L = 0.600 x 0.450 = 0.270.

Then you omitted the second step which I wrote in my first response which is
grams = mols x molar mass = ?
That will be grams = 0.270 x molar mass CaCl2 = ?

posted by DrBob222
6. i got 29.9646 from your explaination on 1

posted by anna
7. is that correct?

posted by anna

## Similar Questions

1. ### AP Chem

An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride dissolves in water, the calcium ions, Ca^+2, and chloride ions, Cl^-, in the crystal go into the
2. ### Chemistry

I would really aprreciate if someone could help me, thank you so much. The white limestone cliffs of Dover, England, contain a large percentage of calcium carbonate(CaCO3). A sample of limestone weighing 84.4g reacts with an
3. ### Chemistry

2NaF + CaCl2 ¨ CaF2 + 2NaCl An excess of 0.20 M NaF is used to precipitate the calcium ions from a 50.0 mL sample of a calcium chloride solution. What is the concentration of the original calcium chloride solution?
4. ### Chemistry

A solution is made by dissolving 10.9 g of calcium chloride, CaCl2,in enough water to make exactly 500 mL of solution. What is the concentration (molarity) of CaCl2 in mol/L?
5. ### chemistry

Calcium chloride, CaCl2, has been used to melt ice from roadways. Given that a solution is 25% CaCl2 by mass, estimate the freezing point.
6. ### Chemistry

When 20.8 g of calcium chloride, CaCl2, was dissolved in water in a calorimeter, the temperature rose from 25.0°C to 37.1°C. If the heat capacity of the solution and the calorimeter is 1258 J/°C, what is the enthalpy change
7. ### Chemistry

I have no idea what I'm doing wrong here... Question: A solution is 0.3% by mass calcium chloride. Therefore, 145 g of the solution contains how many grams of calcium chloride? My solution: 145g x (0.3g / 100g) = 0.435g or 0.44g
8. ### Chemistry

I have no idea what I'm doing wrong here... Question: A solution is 0.3% by mass calcium chloride. Therefore, 145 g of the solution contains how many grams of calcium chloride? My solution: 145g x (0.3g / 100g) = 0.435g or 0.44g
9. ### 12 chemistry

What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?
10. ### Chemistry

A CaCl2 solution is given to increase blood levels of calcium. If a patient receives 5.0 mL of a 5.0 % (m/v) CaCl2 solution, how many grams of CaCl2 were given?

More Similar Questions