Chemistry, 26.11.2019 06:31 Marcus2935

Here is the information: a 1.2516 gram sample of a mixture of caco3 and na2so4 was analyzed by dissolving the sample and adding c2o42- to completely precipitate the ca2+ as cac2o4. the cac2o4 was dissolved in sulfuric acid and the resulting h2c204 was titrated with a standard kmno4 solution.
this is the balanced equation: 3h2c2o4 + 2h+ + mno4- > mn2+ + 4h20 + 6co2
another part: the titration of the h2c2h4 obtained required 35.62 milliliters of .1092 molar mno4- solution. calculate the number of moles of h2c2o4 that reacted with the mno4-. i think the correct answer is .01167 mol h2c2o4. this is not my question.
next part: calculate the number of moles of caco3 in the original sample. based on the answer to the part above, the answer is .003883 mol caco3 (i think this is correct, however this is not my question)
calculate the percentage by weight of caco3 in the original sample.
find this based off of the .01167 mol h2c2o4 and the .003883 mol caco3. basically just use the answers above to solve for this.

Answers: 2

Show answers

Another question on Chemistry

Chemistry, 21.06.2019 22:40

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration?

Answers: 3

Answer

Chemistry, 22.06.2019 14:10

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Answers: 2

Answer

Chemistry, 22.06.2019 19:50

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood

Answers: 3

Answer

Chemistry, 23.06.2019 08:40

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.

Answers: 1

Answer

You know the right answer?

Here is the information: a 1.2516 gram sample of a mixture of caco3 and na2so4 was analyzed by diss...

Questions