1.) One of the main ingredients in most household and industrial cleaners is a l

Question

1.) One of the main ingredients in most household and industrial cleaners is a liquid known as butyl cellosolve, C6H14O2. How many grams of C6H14O2 are needed to produce 125.5 grams of H2O in the folllowing combustion reaction?

2C6H14O2(l) +17O2 ---> 12CO2 (g) +14H2O (g)

2.) When sodium chloride, NaCl, and Sulfuric acid, H2SO4, are mixed, sodium sulfate, Na2SO4, and hydrochloric acid, HCl, are produced. How many grams of Na2SO4 are produced when 125 grams of NaCl is reacted with 125 grams of H2SO4.

2NaCl (aq) + H2SO4(aq) ---> Na2SO4(aq) + 2HCl(aq)

3.) Which two compounds, from the following list of four are strong electrolytes?

[Li2O, HNO2, H2SO4, and C2H5OH]

Explanation / Answer

1)

2C6H14O2(l) +17O2 ---> 12CO2 (g) +14H2O (g)

2 x 118.174 g 6H14O2 wil give 14 x 18 g H2O

X g C6H14O2 will give 125.5 g H2O

X = (125.5 x 2 x 118.174) / (14 x 18)

X = 29661.674 / 252

X = 117.7 g

mass of C6H14O2 required = 1177 g

2) 2NaCl (aq) + H2SO4(aq) ---> Na2SO4(aq) + 2HCl(aq)

NaCl is limiting reagent

2 x 58.5 g NaCl gives 142.04 g Na2SO4

125 g NaCl gives (125 x 142.04) / (2 x 58.5) = 17755 / 117 = 151.7 g

mass of Na2SO4 formed = 151.7 g

3) H2SO4 and Li2O are strong electrolytes

compounds which can dissociates completely in aqueous medium are called strong electrolytes

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