# Chemistry

posted by Tyler

2 KMnO4 + 5 H2C2O4 + 3 H2SO4 ---> 2 MnSO4 + 10 CO2 + 8 H2O + K2SO4

How many milliliters of a 0.123 M KMnO4 solution is needed to react completely with 3.141 of oxalic acid?

1. DrBob222

This four step process will just about work them all. Print this and save it.
1. Write and balance the equation. You've done that.

2. mols H2C2O4 = grams/molar mass = ?

3. Using the coefficients in the balanced equation, convert mols H2C2O4 5o mols KMnO4. That will be mols H2C2O4 x 2/5 = ?

4. M KMnO4 = mols KMnO4/L KMnO4
You know mols and M, solve for L and convert to mL.

Post your work if you get stuck but remember this 4-step process.

4.

2. Tyler

Ok so you take 3.141g and divide that by 90.036?

3. DrBob222

Yes, for step 2.

4. Tyler

Thanks. The problem I was having, I would multiply the grams by the molar mass by everything else I done was correct to what you were saying. What I don't understand is why you divide and not multiple(I do this for when it says a volume of somthing and get the right answer)

5. DrBob222

I don't understand much of what you have written. For the mols oxalic acid, it is grams = mols x molar mass. If you know molar mass and grams and you want mols, that is
g = mols x molar mass
g/molar mass = mols x molar mass/molar mass

Now on the right side, molar mass in the numerator cancels with the molar mass in the denominator to leave just mols and that makes mols = grams/molar mass.
If you give an example of what you are talking about with the volume, perhaps I can help with that too. I think your problem is one of algebra.
If g = mols x molar mass, then
g/molar mass must = mols.

6. Tyler

It's 0.854 M NaOH solution react completely with 2.1 L of a 0.972 M BaCl2. It's a 2:1 but I see what I did. Late nights sometimes mess with ya.

Thank you. Might need help In the future.

7. DrBob222

## Similar Questions

1. ### chemistry

could someone check my answers to see if they are right?
2. ### chemistry check

1. 48 KNO3+ _ C 12 H22O11-„³ ? CO2+ _ N2+ _ K2CO3+ _ H2O a. 12 b. 24 s c. 36 d. 48 The reaction is 48 KNO3 + 5 C12H22O11 --> 24 K2CO3 + 36 CO2 + 55 H2O + 24 N2 So the answer is C =36 2. 6 KNO3+ _ S + ?
3. ### Chemistry

A solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate …
4. ### Chemistry

I need help setting up this problem. How many milliliters of 0.203 M KMnO4 are needed to react with 3.64 g of iron(II) sulfate, FeSO4?
5. ### HARD chemistry

A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- …
6. ### chemistry

A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- …
7. ### chemistry

So I posted this question yesterday and was told I had a few typos.... I fixed them and here is the question again... Please help me!!! A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in …
8. ### Chemistry

I need to know how to right a net ionic equation for the following chemical reaction: 5 H2C2O4 + 3 H2SO4 + 2 KMnO4 = K2SO4 + 2 MnSO4 + 8 H2O + 10 CO2
9. ### Chemistry

24) It was found that a 20.00 mL portion of a solution of oxalic acid, H2C2O4, requires 6.69 mL of 0.200 M K2Cr2O7 for complete reaction in an acidic solution. In the reaction, the oxidation product is CO2 and the reduction product …
10. ### chemistry

Identify the Oxidation and reduction half reaction in 2 KMNO4 + 10 FeSO4 + 8 H2SO4 -> K2SO4 + 2 MNSO4 + 5 Fe2(SO4)3 + 8 H2O Write net ionic equation

More Similar Questions