Chemical Equations
Is Al2O3 soluble in water?
What is insoluble?
What is the empirical formula of glucose, C6H12O6?
What is CH2O?
Reaction: A + B --> AB
10 moles of A
5 moles of B
The limiting reagent?
What is B?
If you dilute 175 mL of a 1.6 M solution of LiCl to 1.0 L, determine the new concentration of the solution.
M1V1 = M2V2
(1.6 mol/L) (175 mL) = (x) (1000 mL)
What is 0.28 M?
What do we call proton donors?
What is an acid?
Write the net ionic equation corresponding to
HClO3(aq) + KOH(aq) → KClO3(aq) + H2O(l)
H+(aq) + OH–(aq) → H2O(l)
Carbon: 1.3874 mol
Hydrogen: 2.7738 mol
Oxygen: 1.3879 mol
What is the empirical formula?
What is CH2O?
2Na + Cl2 --> 2NaCl
Assuming you start with 10 grams of each substance, what is the limiting reagent?
Molar masses:
Na: 22.99 g/mol
Cl: 35.45 g/mol
What is Na?
Sodium hydroxide is extremely soluble in water. A saturated solution contains 572 grams of NaOH(s) per liter of solution. Calculate the molarity of a saturated NaOH(aq) solution.
Molar Masses:
Na: 22.99 g/mol
O: 15.999 g/mol
H: 1.00784 g/mol
What is 14.3 M?
What is the name of CH3COOH?
What is acetic acid?
Write the net ionic equation for
AgNO3 + Na2S → Ag2S + NaNO3
What is 2 Ag+(aq) + S2–(aq) → Ag2S(s)?
Rust occurs when iron metal reacts with the oxygen in the air. Chemical analysis shows that dry rust is 69.9% iron and 30.1% oxygen by mass. Determine the empirical formula of rust.
Molar Masses:
O: 15.999 g/mol
Fe: 55.845 g/mol
What is Fe2O3?
Bromine can be prepared by adding chlorine to an aqueous solution of sodium bromide. The reaction equation is NaBr(aq) + Cl2(g) → Br2(l) + NaCl(aq) How many grams of bromine are formed if a solution containing 25.0 grams of aqueous NaBr(s) and 25.0 grams of Cl2(g) are reacted?
Molar Masses:
Na: 22.99 g/mol
Cl: 35.45 g/mol
Br: 79.90 g/mol
Balanced equation:
2NaBr(aq) + Cl2(g) → Br2(l) + 2NaCl(aq)
What is 19.4 grams?
To what volume should you dilute 133 mL of a 7.90 M CuCl2 solution so that 51.5 mL of the diluted solution contains 4.49 g CuCl2?
Molar Masses:
Cu: 63.546 g/mol
Cl: 35.453 g/mol
What is 1620 mL?
Write the neutralization reaction equation of sulfuric acid and calcium oxide.
What is H2SO4 + CaO --> CaSO4 + H2O?
Complete and balance the equation and write the net ionic equation. If no precipitate forms, then write “no reaction.”
AgNO3(aq) + NaClO4(aq) →
What is no reaction?
A 5.00-gram sample of aluminum metal is burned in an oxygen atmosphere to produce 9.45 grams of aluminum oxide. Use these data to determine the empirical formula of aluminum oxide.
Molar Masses:
Aluminum: 26.9815386 g/mol
Oxygen: 15.999 g/mol
What is Al2O3?
P4(s) + 3 NaOH(aq) + 3 H2O(l) →
PH3(g) + 3 NaH2PO2(aq)
If 20.0 grams of phosphorus and a solution containing 50.0 grams of NaOH are reacted with H2O(l) in excess, how many grams of phosphine will be obtained?
Molar Masses:
P: 30.973762 g/mol
Na: 22.99 g/mol
O: 15.999 g/mol
H: 1.00784
What is 5.49 grams?
A cup of coffee may contain as much as 300 milligrams of caffeine, C8H10N4O2(s). Calculate the molarity of caffeine in one cup of coffee (4 cups = 0.946 liters).
Molar Masses:
C: 12.0107 g/mol
H: 1.00784 g/mol
N: 14.0067 g/mol
O: 15.999 g/mol
What is 0.00653 M?
Write the neutralization reaction equation of sulfuric acid and calcium hydroxide.
What is H2SO4 + Ca(OH)2 --> CaSO4 + 2H2O
Predict the products of the following reaction and write the balanced chemical equation. If no reaction occurs, then write “no reaction.”
An aqueous solution of barium hydroxide is mixed with an aqueous solution of zinc sulfate.
What is Ba(OH)2(aq) + ZnSO4(aq) →
Zn(OH)2(s) + BaSO4(s)?
A compound has a molecular mass of 612 g/mol. Chemical analysis shows that this sodium metaphosphate consists of 22.5% sodium, 30.4% phosphorus, and 47.1% oxygen by mass. Determine the molecular formula of this compound.
Molar Masses:
Na: 22.99 g/mol
P: 30.973762 g/mol
O: 15.999 g/mol
What is Na6P6O18?
A solution containing 17.5 grams of cadmium chloride is mixed with a solution containing 35.5 grams of silver perchlorate.
How many grams of the reactant in excess will remain after the reaction?
Molar Masses:
Cd: 112.411 g/mol
Cl: 35.45 g/mol
Ag: 107.8682 g/mol
O: 15.999 g/mol
Balanced equation:
CdCl2(aq) + 2AgClO4(aq) →
Cd(ClO4)2(aq) + 2AgCl(s)
What is the excess of 1.8 g CdCl2?
Concentrated phosphoric acid is sold as a solution of 85% phosphoric acid and 15% water by mass. Given that its molarity is 15 M, calculate the density of concentrated phosphoric acid.
Molar Masses:
H: 1.00784 g/mol
O: 15.999 g/mol
P: 30.973762 g/mol
Assume 1 L of solution and then calculate the mass of acid. Divide that by 0.85 to get the total mass of solution. Density = mass/volume.
What is 1.7 g/mL?
By titration it is found that 24.6 milliliters of 0.300 M H2SO4(aq) are required to neutralize 20.0 milliliters of NaOH(aq). Calculate the concentration of the NaOH solution.
What is 0.738 M?