Chemical Reactions
What type of chemical reaction is the following?
2Ag + Cl2 --> 2AgCl
Synthesis
What is empirical formula?
The simplest ratio
What is the formula for percent composition?
(mass of element)/(mass of compound) x 100
What can 1 mole equal?
6.022 x 1023 particles
molar mass of an element
What is the mole ratio of zinc to hydrochloric acid in the following reaction?
Zn + HCl --> ZnCl2 + H2
1:2
Balance the following equation:
Al + CuSO4 --> Al2(SO4)3 + Cu
2 + 3 --> 1 + 3
What is molecular formula?
shows the actual atoms present
What is the formula for percent yield?
actual yield/theoretical yield x 100
How many atoms are in 3.3 moles?
1.98 x 1024
How many moles of hydrogen gas can be produced if you have 2.4 moles of hydrochloric acid (HCl)?
Zn + HCl --> ZnCl2 + H2
1.2 moles
What products are always formed during a combustion reaction?
Carbon dioxide (CO2) and water (H2O)
What is the molecular formula of this molecule?
C6H12O6
CH2O
What is the difference between actual yield and theoretical yield?
Actual is from an experiment
Theoretical is found mathematically
How many grams are there in 0.89 moles of magnesium?
21.627
How many grams of zinc chloride can be produced if you have 15 grams of zinc?
Zn + HCl --> ZnCl2 + H2
31.3
Which of the following reactions will occur? Predict their products.
Li + NaCl -->
Fe + NaCl -->
F2 + NaCl -->
I2 + NaCl -->
Li + NaCl --> Na + LiCl
F2 + 2NaCl --> 2NaF + Cl2
A sample of ilmenite contains 5.41 g of iron, 4.64 g of titanium, and 4.65 g of oxygen. Determine the empirical formula for ilmenite.
FeTiO3
What is the percent composition of oxygen in Ba(OH)2?
19%
How many atoms are there in 15 grams of sodium?
3.95 x 1023
If you have 20 grams of zinc and 39 grams of HCl, how much zinc chloride can be produced?
Zn + HCl --> ZnCl2 + H2
41.7 g
A solution of lead (II) nitrate is added to a solution of sodium iodide. Write the chemical reaction that takes place.
Pb(NO3)2 + 2NaI --> PbI2 + 2NaNO3
A colorless liquid composed of 46.68% nitrogen and 53.32% oxygen has a molar mass of 60.01 g/mol. What is the molecular formula?
N2O2
During the combustion of methane, 20 g of CO2 were produced. However, the theoretical yield is 27 g. What is the percent yield?
74%
How many grams are in 3.4 x 1024 formula units of Na2SO4?
0.04
Find how much excess reactant will be left over after 103 grams of zinc react with 76 grams of HCl?
Zn + HCl --> ZnCl2 + H2
34.9 g of Zn left over (not used)