Stoichiometry
C6H12O6(s) --> C2H5OH(l) + CO2(g)
1, 2, 2
What is the equation for percent yield?
Percent Yield =
(Theoretical Yield)/(Actual Yield) x 100
What chapters are on the exam?
Chapters 8 and 13
Define the solute and solvent in the following solution: Saltwater
Solute - salt
Solvent - water
What equation is used for dilution calculations?
M1V1 = M2V2
Consider the following reaction:
Zn(s) + 2HCl(aq) --> H2(g) + ZnCl2(aq)
Calculate the moles of HCl needed to completely react with 8.25 moles of Zinc.
16.5 moles HCl
Consider the reaction:
C3H8 + 5O2 --> 4H2O + 3CO2
If 18 moles of C3H8 react, and 48 moles of O2 react, which is the limiting reactant?
O2
What is the molar mass of (NH4)3AsO4 ?
193.01
Would Ca(NO3)2 dissolved in solution be an electrolyte?
Yes.
Electrolytes are dissolved soluble ionic compounds or acids. Non-electrolytes are dissolved molecular compounds or insoluble ionic compounds.
A 3.20L solution of 7.80M NaCl is used to make a 75.0L solution. What is the concentration of NaCl in the new solution?
0.333M NaCl
Consider the following reaction:
Pb(NO3)2(aq) + 2KI(aq) --> PbI2(s) + 2KNO3(aq)
Calculate the grams of Lead (II) Iodide that can be produced from 5.00 moles of Potassium Iodide.
1.15 x 10^3 grams PbI2
Consider the following reaction:
3AgNO3 + FeCl3 --> 3AgCl + Fe(NO3)3
Which is the limiting reactant when 25.0 grams of Silver nitrate react, and 45.0 grams of Iron (III) chloride react?
AgNO3
What is the chemical symbol for strontium?
Sr
Calculate the concentration of solute in mass percent for the following:
179g C12H22O11 in 501 grams H2O
26.3% C12H22O11
How many grams of Lithium Phosphate are needed to prepare 1.50mL of a 0.222M solution?
0.0386 g Li2PO4
Given the reaction:
4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(l)
When 1.20 moles of ammonia reacts, what is the total number of moles of product formed?
3.00 moles total
Consider this reaction:
Cu2O + C --> 2Cu + CO
11.5 grams of C react with 114.5 grams of Cu2O, and 88.9 grams of Cu are obtained. What is the percent yield?
87.4%
What's the charge of a Co ion with 25 electrons?
2+
How many moles of NaCl are contained in 55.5 grams of a solution saltwater that is 12.3% NaCl by mass?
0.117 moles NaCl
Consider this reaction:
Zn + 2HCl --> ZnCl2 + H2
What volume 0.1M hydrochloric acid will react with 26 grams of zinc?
8.0L HCl
The average human requires 120.0 grams of glucose (C6H12O6) per day. How many grams of CO2 do plants have to gather in order to produce this amount of glucose in the following photosynthesis reaction?
6CO2 + 6H2O --> C6H12O6 + 6O2
175.9 grams of CO2
Consider the following reaction:
3HC2H3O2 + Al(OH)3 --> 3H2O +Al(C2H3O2)3
How much of the excess reagent will be left over after the reaction is complete?
245 grams Aluminum hydroxide
How many kilograms are in 2.7866 x10^2 milligrams of carbon atoms?
2.7866 x10^-4 kg of carbon atoms
80-proof vodka contains 272.7 grams of alcohol per 750mL bottle. The density of vodka is 0.909 g/mL. What is the mass% alcohol in vodka?
40.0% alcohol
Consider this reaction:
K2S + Co(NO3)2 --> 2KNO3 + CoS
What volume of 0.275M K2S solution is necessary to completely react with 134 mL of 0.223M Co(NO3)2?
109mL K2S solution