# chemistry

posted by .

Hi. I'm not sure if my strategy for this problem is correct:

How many grams of CaCO3 will dissolve in 3.0x10^-2 mL of 0.050M Ca(NO3)2?

I think I'm supposed to convert molarity of Ca(NO3)2 into moles, but then i don't know how to get from mols of that to mols of CaCO3..is it a 1 to 1 ratio? from then on do i just convert to grams?

Thanks.

• chemistry -

This is a solubility product problem with CaCO3 in which there is a common ion (the Ca in Ca(NO3)2)
CaCO3 ==> Ca^+2 + CO3^=

Ksp = (Ca^+2)(CO3^=) = ??
Look up the Ksp for CaCO3.

Ca(NO3)2 ==> Ca^+2 + 2NO3^- (100% ionized)
[Ca(NO3)2] = 0.05 M
Let y = solubility of CaCO3, then y = concn of Ca^+2 from CaCO3 and y is concn of CO3^=. Total (Ca^+2) = y+0.05 (that's Ca from CaCO3 and Ca from Ca(NO3)2).
Solve for y, the units will be mols/L CaCO3, then convert from mols/L to mols/3.0 x 10^-2 mL, and from there to grams.
0.05 M = (Ca^+2) from Ca(NO3)2

## Similar Questions

1. ### Chemistry ....Please Double check

If 4.55 g of sodium sulphide and 15.0 g of bismuth nitrate are dissolved in separate beakers of water which are then poured together, what is the maximum mass of bismuth sulphide, an insoluble compound, that could precipitate?
2. ### Chemistry

Find the mininum ammount of 5.0 M HNO3 needed to dissolve 2.72 g of Cu (s). I have the balanced equation here: 2NO3-(aq)+8H+(aq)+3Cu(s)-->2NO(g)+4H2)(l)+3Cu2+(aq) Obviously it is a 2 moles NO3- to 3 moles of Cu (s) ratio. I converted …
3. ### Chemistry

3Ca(NO3)2(aq)+2Na3PO4(aq)->Ca3(PO4)2(s)+6NaNO3(aq) A.)the moles Na3PO4 required to react with 2.03 L of 0.891 M Ca(NO3)2 B.)the grams of Ca3(PO4)2 that can be obtained from 136 mL of 0.627 M Ca(NO3)2 C.)the volume of 0.76 M Na3PO4 …
4. ### chemistry

Posted by Jenni on Monday, December 13, 2010 at 3:32pm. Determine the molarity of nitrate ions in a solution prepared by mixing 25.0 mL of 0.50 M Fe(NO3)3 and 35.0 mL of 1.00 M Mg(NO3)2 Please explain fully do not know where to start?
5. ### Chemistry

(0.75 moles Al(NO3)3/L Al(NO3)3) x 0.040 L Al(NO3)3 = ?
6. ### chem

I really need these answers to balance the net ionic equation or make it into one. Cu(NO3)2 (aq) + NaOH (aq) = CuOH (s) + Na(NO3)2 (aq) Cu(NO3)2 (aq) + NaI (aq) = CuI (s) + Na(NO3)2 (aq) Cu(NO3)2 (aq) + Na3PO4 (aq) = CuPO4 (s) + Na3(NO3)2 …
7. ### Chemistry

A student reacted 0.500g of Pb(NO3)2 with 0.750g of KI according to the reaction, Pb(NO3)2(aq) + 2KI(aq)=PbI2(s) + 2KNO3(aq) A) How many moles of Pb(NO3)2 were used?
8. ### Chemistry

Solubility Rules!! Homework problem I desperately need help with Solutions used: 6M HCl, 6M NaOH, 6M NH3, 3M H2SO4 Mixed with: Cr(NO3)3, Fe(NO3)3, Bi(NO3)3, Mg(NO3)2, Pb(NO3)2 please help me and tell me which form precipitates and …
9. ### Chemistry (Check)

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. Calcium nitrate is decomposed with heat to give calcium nitrite and oxygen gas. …
10. ### Chemistry (Check and Help)

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 8.75 g of mercury (II) nitrate solution is mixed with 9.83 g sodium iodide solution …

More Similar Questions