Reactions/Balancing
Balance the following equation!
_Mg + _H2O -> _Mg(OH)2 + _H2
1 Mg + 2 H2O -> 1 Mg(OH)2 + 1 H2
What is Avogadro's number?
6.022 x 1023
What is Boyle's Law?
P1V1 = P2V2
What are the equations to calculate pH & pOH
pH = -log[H3O+]
pOH = -log[OH-]
What does the symbol (aq) mean..?
dissolved in water (aqueous)
What type of reaction is the following..?
2NaNO3 + CaCl2 -> 2NaCl + Ca(NO3)2
Double Displacement
7.7 x 1025 atoms Ni = _ grams Ni
7546.5 grams
When using the ideal gas law, what units do you use for:
Pressure? __
Volume? __
Temperature? __
Pressure? atm
Volume? L
Temperature? K
What is the pH of a solution that has a [H3O+] concentration of 7.23 x 1023 M?
3.14
What is the equation used to calculate Dilutions?
M1V1 = M2V2
Balance the following reaction!
_ Fe2(SO4)3 + _ KOH -> _ K2SO4 + _ Fe(OH)3
1 Fe2(SO4)3 + 6 KOH -> 3 K2SO4 + 2 Fe(OH)3
If it takes 770 joules of energy to raise the temperature of 50.0g of mercury by 110 degrees Celsius, what is the specific heat capacity of mercury?
0.14 J/g C
A 2.0 L bottle has a pressure of 850 Torr. What is the new volume if the pressure is increased to 750 Torr..?
2.3 L
What is the pOH of a solution that has a [OH-] concentration of 1.25 x 10-6 M...?
5.90
What is the molarity of 21.5g NaOh dissolved in water to make 0.250 L of solution?
2.15 mol
Balance and classify the following reactions!
_ P + _ O2 -> _ P2O5
_ NaNO3 + _ CaCl2 -> _ NaCl + _ Ca(NO3)2
4 P + 5 O2 -> 2 P2O5
(Synthesis Reaction)
2 NaNO3 + 1 CaCl2 -> 2 NaCl + 1 Ca(NO3)2
(Double Displacement Reaction)
Using the following equation, answer the prompt.
Fe2O3 + 3CO -> 2Fe + 3CO2
What is the percent yield if 24.3L of CO2 are produced at STP..?
68.3 Liters
a.) If volume is held constant and temperature is increased, then pressure will _________.
b.) If pressure is held constant and volume is increased, then temperature will _________.
c.) If temperature is held constant and pressure is increased, then volume will _________.
a.) increase
b.) increase
c.) decrease
What is the pH of a solution that has an [OH-] concentration of 7.99 x 10-11 M...?
3.90
What is the concentration of the desired solution if 30mL of a concentrated solution of 8.00M HCl was used to make a solution containing 430mL...?
0.6 M
Balance and classify the following reaction!
_ C2H6 + _ O2 -> _ CO2 + _ H2O
2 C2H6 + 7 O2 -> 4 CO2 + 6 H2O
Combustion reaction
Using the following equation, answer the prompt.
4 NH3 (g) + 5 O2 (g) -> 4 NO (g) + 6 H2O (g)
29.6 liters NO are produced by using how many molecules of NH3?
7.96*1023 molecules.
A 47.0 mL volume of gas is collected at 18 degrees Celcius and 98.5 kPa. What volume will the gas occupy at STP?
(Answer in mL.)
42.9 mL
What is the pOH of a solution that has a [H3O+] concentration of 1.02 x 10-3 M...?
11.01
How many grams of sodium chloride are needed to make 730 mL solution with a concentration of 0.88M..?
37.58 grams NaCl