Unit 7 Test Flashcards
What are the 5 types of chemical reactions
Synthesis
Decomposition
single-replacement reaction
double-replacement reaction
combustion
solution
aqaeus
Determine the empirical and molecular formulas for each compound.
Caffeine is composed of 49.45%C, 5.15% H, 28.9% N, and 16.5% O. Caffeine has a molar mas of 194 g/mol. Determine the molecular formula for Caffeine.
C4H5N2O
C8H10N4O2
Whats the percent composition of sodium chloride
39% Na
61% Cl
Whats the percent composition of potassium sulfate
45% K
18% S
37% O
Whats Avagadro’s number/Mole
6.02x10^23
Find the molar mass of AgNO3
169.88
What is STP
Standard temperature pressure (0 degrees)
Which one is an empirical formula and which is a molecular formula
C3H9O3
CH3O
Molecular
Empirical
Which is a coefficient and which is a subscript
3CO
CO2
Coefficient
Subscript
Balance this equation
Fe+H2SO4——-Fe2(SO4)3+H2
2Fe+3H2SO4———Fe2(SO4)3+3H2
magnesium+nitric acid———-magnesium nitrate+hydrogen
Balance and determine type of reaction
Mg+2HNO3——–Mg(NO3)2+H2
single-replacement
2Al+Fe2O3———Al2O3+2Fe
single-replacement
2NaCl+H2So4—–Na2So4+2HCl
double-replacement reaction
C5H12+8O2——-5CO2+6H2O
combustion
2NaNO3——–2NaNO2+O2
decomposition
2NH3+H2SO4——-(NH4)2SO4
synthesis
What is conserved in a chemical reaction
Atoms and mass
- Silver nitrate is made to react with iron(III) chloride in a double replacement reaction.
a. Write a balanced chemical equation
b. What product forms a precipitate?
c. If 18.0 g of silver nitrate reacts with 32.4 g of iron (III) chloride, which reactant is the limiting reactant?
d. How many grams of excess reagent are left over after the reaction?
e. How many grams of precipitate can theoretically be produced in this reaction?
f. If 13.8 g of silver chloride are actually produced in the laboratory, what is the percent yield?
a. 3AgNO3+FeCl3——–3AgCl+Fe(NO3)3
b. 3AgCl
c. AgNO3
d. 26.67 g FeCl3
e. 15.19 g
f. 91%
