Asked by Anonymous
calculate the mass percent of sand, sodium chloride and copper(ll) sulfate in a sample that yields: mass of sample= 14.088g, mass of sand=0.2255g, mass of copper(ll)oxide = 0.1994g (assume 100% yield for each of the copper(ll) reactions)
CuSO4(aq) + 2NaOH(aq) --> Cu(OH)2(s) + Na2SO4(aq)
Cu(OH)2---> CuO(s) +H2O
CuSO4(aq) + 2NaOH(aq) --> Cu(OH)2(s) + Na2SO4(aq)
Cu(OH)2---> CuO(s) +H2O
Answers
Answered by
DrBob222
Would you please check your post. You need to explain what you're doing. Where did the NaCl come from? What did you do with the excess NaOH?
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