16) (6 points) You have a stock solution of 12M Hydrochloric Acid. How many mL of this solution should you dilute to make 125.0 mL of 0.350 M Hydrochloric Acid?

Select either True/False to state whether the following definition is correct for the following term/principle (i.e. if it is correct, select "True"): Common lon Effect: The solubility of a material is unchanged when at least one of its conjugates are also present in the solution. True False Question 4 (1 Select either True/False to state whether the following definition is correct for the following term/principle (i.e. if it is correct, select "True"): Trend observed for the osmotic pressure of a solution: The osmotic pressure of a solution defined as the pressure required to encourage ion flow across a semipermeable membrane. This is known as a colligative property. True False

2. A solution with a final volume of 500 mL was prepared by dissolving 25 mL of Methanol (CH3OH; d = 0.7914g/ml) in chloroform. Calculate the M of this solution. Calculate for the m if the solvent has a density of 1.49 g/mL.

Which of the following represents the hydration of acetic acid (a weak electrolyte)? O CH3COOH () H20 CH3+ (aq) + COOH (aq) O CH3COOH () H20 CH3COO (aq) + H* (aq) H20 O CH3COOH () CH3COO (aq) + H* (aq) H20 CH3COOH () CH3COOH (aq)

If the molar solubility of a compound with the chemical formula AB2 is (8.5x10^-6) mol/L, what is its Ksp? (FINAL ANSWER ONLY) Note: Your answer is assumed to be reduced to the highest power possible. 4 Your Answer: Answer x10

Calculate the concentration in % of 50.0g of solid is dissolved in 250. mL of water.

a solution system salt (s) + energy > ions (aq) is in equilbrium at 20 degrees Celsius with some salt on the bottom of the container.   What will be the effect on the system if: The volume of the container is doubled but the volume of solution and the amount of salt is constant, that is, same as the original amounts? Stress: Desire: Shift: Final volume of water (l)

Part A How many moles of solid sodium fluoride should be added to 5.0 L of a saturated solution of barium fluoride, BaF2, at 25 °C to raise the fluoride concentration to 0.029 mol/L ? Express your answer to two significant figures and include the appropriate units. n = 0.11 ? moles Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining

Question 4 (4 points) An aqueous solution of KF has a freezing point of -2.48 °C. Assuming total dissociation of the salt, determine the (a) concentration of the aqueous solution; (b) boiling point of the solution; (c) mass of KF needed to be added to 100.0 g of water to make the solution. (molar mass of KF = 58.1 g/mol; For water: Kf = 1.86 °C/m; Kb = %3D 0.512 °C/m) m = A Bp (answer to 2 decimal places) = mass KE =

Lisa, a librarian at the Knights of Favonius, is also a great potion maker. She wants to create a potion containing potassium dichromate (K2Cr2O7). The only available solutions in her laboratory are 25.0 mL of 0.650 M solution and 18.0 mL of 0.350 M solution.   What is the concentration of potassium dichromate (in M) when the two solutions are combined? What is its concentration in % w/v? For this potion to have a stronger effect, Lisa wants it to have a concentration of 20.0 % w/v. Can she create it based on combining the available solutions alone? Lisa only settled to produce the lesser potent potion with 10.0 % w/v. How much water will she add (in mL) to achieve this concentration?