chemistry
posted by angel
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.

DrBob222
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 = ? 
anna
mxl=270
so the answer to 1. is 270?
so the answer to 2. is S2?
so the answer to 3. is 6.3875? 
DrBob222
1. You forgot to change 600 mL to L. The answer is 0.270 mols.
2. is yes
3. I don't get your answer.
M x L = 1.75 x 3.65 = ?
? x molar mass = ? x 111 = approx 710 grams. 
anna
1. is incorrect, it is not .270, i have one more chance on my practice sheet to answer this.
2. was good, thanks 
DrBob222
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 = ? 
anna
i got 29.9646 from your explaination on 1

anna
is that correct?
Respond to this Question
Similar Questions

12 chemistry
What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)? 
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 excess … 
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 when … 
AP Chem
An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? 
science
how do you do this question An aqueous solution of calcium chloride contains 2 grams of calcium chloride ( molar mass 110.98 g mol1) in 100 ml calculate the concentration of chloride ion (Cl) in the solution 
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? 
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? 
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? 
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. 
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?