Question

4. When liquid 2-chloro-2-methylpropane, CaHsCl, is added to ethanol (CH3CH2OH) in water, the following reactions can occur: САн,Сі + CH,сH,0н нсі + С.Н,осн,CH, C&HCI + H20 HCI CH,OH (1) (2) The density of liquid CaHsCl at 25'C is 0.851 g/mL. Into a beaker was added 0.100 mL of CaHsCl and only reaction (1) occured: a. What mass in grams of ethanol will be required to fully react with all of the C4HCI? b. What mass in grams of CaHsOCH;CHs will be produced if the amounts in the question were combined? c.What mass in grams of HCI will be produced if the amounts in the question were combined?

*please solve using dimensional analysis, thank you*

Answer 1

Ans 4 :

a)

density = mass / volume

0.851 g/mL = m / 0.100 mL

m = 0.0851 g

mol C4H9Cl = mass /molar mass

= 0.0851 g / 92.566 g/mol = 9.19 x 10^-4 mol

so mol ethanol will also be 9.19 x 10^-4 mol

mass ethanol = mol x molar mass

= 9.19 x 10^-4 mol x 46.07 g/mol

= 0.042 grams

b)

Number of mol of C4H9OCH2CH3 formed will be : 9.19 x 10^-4 mol

mass of C4H9OCH2CH3 = mol x molar mass

= 9.19 x 10^-4 mol x 102.17 g/mol

= 0.094 grams

c)

Number of mol of HCl produced = 9.19 x 10^-4 mol

So mass of HCl = mol x molar mass

= 9.19 x 10^-4 mol x 36.46 g/mol

= 0.0335 grams