chem090

100.0 g of Potassium Phosphate reacts with 100.0 g of Barium Chloride. Which molecule is completely used up by the reaction? How many grams of the other molecule are left over?

  1. 👍 0
  2. 👎 0
  3. 👁 251
  1. This is a limiting reagent (LR) problem. You know that because amounts are give for BOTH of the reactants.
    mols BaCl2 = grams/molar mass = approx 0.48 but you should confirm this and all of the calculations that follow and you should carry all of them to at least three places.
    mols K3PO4 = 0.47

    ...3BaCl2 + 2K3PO4 ==> 6KCl + Ba3(PO4)2
    Convert mols BaCl2 to mols product. That's approx 0.48 x (1 mol Ba3(PO4)2/3 mols BaCl2) = 0.48 x 1/3 = about 0.16
    Do the same for mols K3PO4 to mols Ba3(PO4)2. I obtained approx 0.235. You can see these values are not the same which means one of them is not right; the correct value in LR problems is ALWAYS the smaller value and the reagent producing that value is the Limiting Reagent. In this case that is BaCl2. That means BaCl2 is completely used and there is none left over. There is some K3PO4 unused in the reaction. How much is used? Use the coefficients again just as you did to determine the LR.
    0.48mols BaCl2 x (3 mols K3PO4/2 mols BaCl2) = 0.48 x 2/3 = 0.32 mols K3PO4 used. We had 0.47 to start so we have 0.47-0.32 = 0.15 mols K3PO4 not used.
    You can convert that to grams by g = mols x molar mass. Remember you need to go through this yourself and check the numbers to three places. I now the 0.47 has more.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    The net ionic equations for the following 1. Dissolution of silver oxalate with nitric acid 2. Complexation of the iron(III) by the thiocyanate ion 3. Precipitation of the carbonate ion with barium ion 4. precipitation of the

  2. Chrmistry

    Aqueous potassium phosphate was mixed with aqueous magnesium chloride, and a crystallized magnesium phosphate product was formed. Consider the other product and its phase, and then write the balanced molecular equation for this

  3. Chemistry

    Bones are mostly calcium phosphate. Calcium chloride reacts with potassium phosphate to form calcium phosphate and potassium chloride. Indicate the physical states or reactants and products a) Write the balanced equation of the

  4. chemistry

    Write the balanced molecular, complete ionic, and net ionic equations for the following reactions in aqueous solution: a. magnesium chloride reacts with potassium carbonate b. sulfuric acid reacts with sodium hydroxide

  1. ap chemistry

    what mass of barium sulfate can be produced when 100 ml 0.100 M of solution of barium chloride is mixed with 100.0 ml of a 0.100 M solution of Iron (III) sulfate

  2. Chemistry

    A 10.00 gram solid sample consisting of a mixture of sodium chloride and potassium sulfate is dissolved in 100.0 mL of water is combined with another 200.0 mL solution that contains excess aqueous lead(II) nitrate. Upon mixing the

  3. Chemistry URGENT

    can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for

  4. chemistry

    write a net ionic equation for the following: 1)Iron (III) chloride reacts with Potassium hydroxide to produce Iron (III) oxide, Potassium chloride, and Hydrogen gas. 2)Hydrochloric acid reacts with Potassium carbonate to produce

  1. Chem

    18) Chlorine reacts with potassium bromide to produce potassium chloride and bromine. A) write a chemical equation, using words, to represent the above chemical reaction. My answer: chlorine + potassium bromide ==> potassium

  2. chemistry

    A saturated solution of barium chloride at 30 °C contains 150 g water. How much additional barium chloride can be dissolved by heating this solution to 80 °C? 2. A solution of KCl is saturated at 20 °C. a) How many grams of

  3. Chemistry

    Write a balanced equation for the following: aqueous barium chloride reacts with aqueous sodium chromate to form aqueous sodium chloride plus solid barium chromate.

  4. Ap Chemistry

    a mixture contains only sodium chloride and potassium chloride. a .1586-g sample of the mixture was dissolved in water. it took 22.90 mL of 0.1000 M AgNO3 to completely precipitate all the chloride present. what is the

You can view more similar questions or ask a new question.