Concentration Calculations
Calculate the molarity of a solution containing 0.125moles of NaOH dissolved in 0.500L of water.
0.250M
What is the correct formula for dilution problems?
C1V1=C2V2
What is the Arrhenius Theory of acids and bases?
An acid is a substance that dissociates in water to produce hydrogen ions (H+).
A base is a substance that dissociates in water to produce hydroxide ions (OH-).
What is the first step to any stoichiometry problem?
Write the balanced chemical equation
A homogeneous mixture of two or more substances.
Solution
20 g of NaOH is dissolved in 180 g of water. Calculate the mass percent.
10%
This quantity stays constant when a solution is diluted
moles
H+(aq) + OH-(aq) --> H2O(l)
What volume of 0.10 M NaOH is required to neutralize 25.0 mL of 0.15 M HCl?
37.5mL
This is the substance dissolved in a solution.
Solute
You dissolve 5.0 g of NaCl in enough water to make 250 mL of solution. Calculate the m/v %.
2.0%
You have 50 mL of 2.0 M HCl. You want to dilute it to 0.5 M. What is the final volume?
200mL
Calculate the hydrogen ion concentration of a solution with a pH of 3.
1.0×10−3 M
50.0 mL of 0.30 M HCl is titrated with NaOH. How many mL of 0.15 M NaOH are needed to neutralize it?
100mL
A measure of how much solute is dissolved in a given amount of solution.
concentration
If the acceptable limit of lead in water is 0.25 ppb, what mass of water must you consume (drink) to be the equivalent of 1.0 g of lead?
4.0x10^9g water
A 0.50 M HCl stock solution is used to prepare 250 mL of 0.10 M HCl. What volume of stock solution is needed, and how much water must be added to reach the final volume?
50mL stock, 200mL water
Calculate the pH of a solution with [H+]=2.5×10−4 M
3.6
You mix 50.0 mL of 0.2 M HCl with 30.0 mL of 0.3 M NaOH. Which reactant is the limiting reagent?
NaOH
The maximum amount of solute that can dissolve in a solvent at a given temperature.
Solubility
You dissolve 8.50 g of Na₂CO₃ in enough water to make 500 mL of solution. Calculate the molarity of the solution.
0.160 M
A laboratory technician prepares a solution by first diluting 25.0 mL of 6.00 mol/L nitric acid (HNO₃) to a total volume of 500.0 mL. From this diluted solution, 75.0 mL is then removed and further diluted to 300.0 mL. What is the final concentration of HNO₃ in the second diluted solution?
0.0750M
When 40.0 mL of 0.150 mol/L HCl is mixed with 25.0 mL of 0.100 mol/L NaOH, determine the limiting reagent and the pH of the resulting solution.
1.27
What mass of silver chloride (AgCl) precipitate forms when 50.0 mL of 0.200 mol/L silver nitrate (AgNO₃) is mixed with 50.0 mL of 0.150 mol/L sodium chloride (NaCl)?
1.08g
A reaction in which an acid and a base react to form water and a salt.
Neutralization Reaction