Chem 204 Lab

posted by .

Dr. S. N. Too ran the above reaction using 10.00 g of 1,5-pentanediol and 7.00 g
of HCl. He obtained 9.23 g of 1,5-dichloropentane. What was his per cent yield?
HO(CH2)5OH + 2 HCl --------> Cl(CH2)5Cl + 2 H2O

  • Chem 204 Lab -

    This is a limiting reagent problem.
    You have the equation.
    Convert 10.00 g of 1,5 pent--- to mols. mols = grams/molar mass

    Convert 7.00g HCl to mols the same way.

    Using the coefficients in the balanced equation convert mols of each reactant to mols of the product. It is likely you will get two numbers; of course that can't be right. The correct answer in limiting reagent problems is ALWAYS the smaller value and the reagent responsible for that is the limiting reagent.
    Then convert the smaller number into grams. g = mols x molar mass. This is the theoretical yield (TY). The actual yield (AY) is 9.23 g
    %yield = (AY/TY)*100 = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. organic chemistry

    is an α,β-Unsaturated ester CH2=CHCO2Et more or less reactive than an CH2=CHOEt in electrophilic addition and where do the two slot into the reactivity order of CH2=CH2 < CH2=CHMe < CH2=CHBr i think CH2=CHOEt is more …
  2. Chemistry

    It is difficult to type these but I'll do my best. This is the first question and I just don't get it. My professor is out of the country so any help would be appreciated. Give the IUPAC name for each of the following alkanes: CH3 …
  3. Chem 121

    Use Hess's law and the reactions 1) CH 4(g)+ Cl 2 (g)--->CH 3 CL(g) + HCl (g) 2) CH 3 Cl (g) + Cl 2 (g)---> CH 2 Cl 2 (g) + HCl (g) to determine the enthalpy for the reaction CH4 (g) + 2CH 2 (g)---> CH2 Cl 2 (g) + 2HCl (g)?
  4. Chemistry

    1)Which compound below would be expected to have the highest boiling point?
  5. Chemistry

    Which compound below would be expected to have the highest boiling point?
  6. Chemistry

    Which compound below would be expected to have the highest boiling point?
  7. Chemistry

    Which compound below would be expected to have the highest boiling point?
  8. chemistry

    I can't seem to figure out the name of this organic molecule. I know it's an amine, but that's it. There are two methyls (CH3) attached to a CH, followed by (in order) NH, CH2, CH2, CH2, and CH3. (ignore the ^^^, I had to use them …
  9. chemistry

    complete each of the following and name the product a CH3CH2CH=CH2+HCl gives b CH3CH2CH=CH2+Br2 gives c CH3CH2CH=CH2+H2o-H+gives d CH3CH2CH=CH2 alkalin and kMno4 gives as
  10. Chemistry

    Draw and repeat unit for a reaction product of glycol: HO-CH2-CH2-CH2-CH2-OH with the following carboxylic acid: HO-C-CH2-CH2-C-OH = = O O

More Similar Questions