# Chemistry

posted by .

How many milliliters of 0.0850 M Na3PO4(aq) will react with 22.00 mL of 0.0800 M MgCl2(aq)?

3 MgCl2(aq) + 2 Na3PO4(aq) ==> Mg3(PO4)2(s) + 6 NaCl(aq)

V x M = V x M
(22.00mL)(0.0800M) = (0.0850M)(x)

Is this the correct set-up? Does it have 4 sigfigs, or am I wrong?

• Chemistry -

No. V x M = V x M works ONLY when the reactions coefficients are the same; i.e., 1:1, 2:2 etc.
How many moles MgCl2 do you have? That is M x L = ?moles MgCl2.
Now, using the coefficients in the balanced equation, convert moles MgCl2 to moles Na3PO4.
moles Na3PO4 = ?moles MgCl2 x (2 moles Na3PO4/3 moles MgCl2) = xmoles Na3PO4.
Finally, M Na3PO4 = moles Na3PO4/L Na3PO4. YOu have moles and M, solve for L, then convert to mL.

• Chemistry -

Thank you SO much.
Not only did you help me get the correct answer, but you helped increase my understanding of these problems.
Cheers to you.

• Chemistry -

what does the 'M' mean?

## Similar Questions

1. ### chemistry

Which term in the following reaction would not be included in the equilibrium expression?
2. ### 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 …
3. ### AP Chemistry

What volume of 0.149 M K3PO4 is required to react with 41 mL of 0.793 M MgCl2 according to the equation 2 K3PO4 + 3 MgCl2 → Mg3(PO4)2 + 6 KCl Answer in units of m
4. ### AP Chemistry

For the reaction 3 FeCl2 + 2 Na3PO4 → Fe3(PO4)2 + 6 NaCl , what is the maximum amount of Fe3(PO4)2 which could be formed from 11.26 g of FeCl2 and 13.34 g of Na3PO4?
5. ### chemistry

3 MgCl2(aq) + 2 Na3PO4(aq) ==> Mg3(PO4)2(s) + 6 NaCl(aq) How many milliliters of 0.0800 M Na3PO4(aq) will react with 0.060 mol of MgCl2(aq)?
6. ### Chemistry

For the reaction ? FeCl2 + ? Na3PO4 → ?
7. ### chemistry

What volume of 0.714 M K3PO4 is required to react with 27 mL of 0.97 M MgCl2 according to the equation 2 K3PO4 + 3 MgCl2 → Mg3(PO4)2 + 6 KCl Answer in units of mL
8. ### Chemistry

please help! I don't understand any of this. Using the Solubility Rules, write the balanced molecular, total ionic, and net ionic equations (including physical states) for the following: Hints: There is no such thing as an Na3+. Na …
9. ### chem

. (a) A solution was prepared by dissolving 1.4295 g of magnesium chloride (MgCl2) into water and made up to 25.0 mL, calculate the molar concentration of the solution. (3 marks) (b) A 250.0 mL of 0.50 M solution of sodium phosphate …
10. ### chemistry

A) A solution was prepared by dissolving 1.113 g of MgCl2 into water and made up to 50.0 ml, calculate the molar concentration of the solution. B) A 250.0 ml of 0.50 M solution of Na3PO2 solution was prepared by diluting 2.5 M of stock …

More Similar Questions