‫`المملكة العربية السعودية‬
Kingdom of Saudi Arabia
‫وزارة التعليم العالي‬
Ministry of Higher
‫جامعة المجمعة‬
Education
‫عمادة السنة التحضيرية‬
Majma'a University
Preparatory Year Deanship
Work sheet (5)
1) Study the following :
Characteristic
Strong
Electrolyte
Does not conduct electricity in
solution
dissociate into ions completely
Good conductor for electricity in
solution
weak acid and base
Soluble in water
dissociate into ions partially
Strong acid and base
week conductor for electricity in
solution
2) write down the number of Ions:
Al2(SO4)3
Cu(NO3)2
Fe(NO3)3
Na3PO4
Fe2O3
CaCO3
1
Week
Electrolyte
Non
Electrolyte
3) Consider the following:
NH3
HNO3
C2H5OH
CaOH
HNO2
NaOH
H2SO4
HCl
4) The empirical formula of C6H12O2
a)
b)
c)
d)
C2H4O
CH2O
C3H6O
C3H6O2
5) Write the net ionic equation for the following reaction :
K2CO3(aq) + CaI2(aq) → 2KI(aq) + CaCO3(s)
…………………................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
6) Calculate the percentage composition of each element in MgSO4
( Atomic masses: Mg = 24 , S = 32 , O = 16 g/mol).
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
2
7) A sample of compound composed of 3.6 g of Carbon ( C ) and 0.3 g of
Hydrogen ( H ), Find the empirical formula of that compound ?
(Mm C = 12 , H = 1 g/mol )
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
……………………………………………………………………………
…………………………………………………………………………….
8) If 15 g of Mg mixed with 20 g HCl, how many moles of MgCl2 will be
produced ?
Mg + 2HCl→ MgCl2 + 2H2
( Mm: Mg = 24 , Cl = 35.5 H = 1 g/mol)
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
3
9) If 15.00 g of C2H5OH react with g of 20.00 g O2 , according the following
balanced equation.
C2H5OH + 3O2
2CO2 + 3H2O
a) Calculate the theoretical yield CO2 produced (in grams) ?
( C = 12 ,O = 16 , H = 1 g/mol )
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
b) If the actual yield of CO2 is 12.00 g . Calculate the percentage yield of CO2 ?
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
…………………………………………………………………………………
4