Academy of Art University Chemistry Worksheet

Description

Hi

I have HW, its chemistry class lab, just watch the videos and answers the questions.

the videos down bellow and the questions as well

QUESTION 1

  1. Complete the following table

    Mass of beaker g
    Mass of beaker and CuSO4·5H2O g
    Mass of CuSO4·5H2O g
    Mass of Al foil g
    Mass of beaker and copper (first heating) g
    Mass of beaker and copper (second heating) g
    Mass of beaker and copper (third heating, if needed) g
    Mass of copper metal g

QUESTION 2

  1. Write the balanced reaction of aluminum with copper(II) sulfate in aqueous solution.

QUESTION 3

  1. Complete the following table

    Moles of copper product based on moles of Al mol
    Moles of copper product based on CuSO4·5H2O mol
    Limiting reactant
    Reactant in excess
    Amount of excess reactant that was unreacted g
    Theoretical yield of copper g
    Percent yield of copper %

QUESTION 4

  1. Based on your experimental procedures, give some reasons for obtaining a percent yield of less than 100%.

QUESTION 5

  1. Heating the copper product at too high a temperature in an oxygen atmosphere results in the formation of black copper(II) oxide, CuO. Write a balanced equation for this reaction.