Solutions Questions and Answers

A 27.46 mL solution of weak acid is titrated with 0.0859 M NaOH. It requires 75.15 mL of the NaOH titrant to reach the equivalence point. Based on the titration curve, it is determined that K₂ = 9.5 x 10- 10 for the weak acid. Based on this information, what was the pH after only 39.28 mL of NaOH was added? Write your answer to 2 decimal places (ie. 1.23 or 12.34).

Nitrogen gas has a Henry's law constant of 8.42x107 M/mmHg at 20.0 °C when dissolving in water. If the total pressure of gas (N₂ gas plus water vapor) over water is 1.00 atm, what is the concentration of N₂ in the water in grams per milliliter? Pressure of the water vapor at 20.0 °C = 17.5 mmHg. g/mL

At a certain temperature, lead (II) chloride, PbCl2, has a value of Ksp = 9.0 x 10*-5. At this temperature, what is the molar solubility of PbCl2 in the presence of 0.121 M CaCl2? Report your answer to two significant figures (i.e. 1.2E-5M).

This question has multiple parts. Work all the parts to get the most points. a Calculate the mass in grams of solute required to prepare 855.0 mL of 5.00 M NH4Cl solution. b Calculate the mass in grams of solute required to prepare 2.50 L of 0.700 M KCI solution. c Calculate the mass in grams of solute required to prepare 278 mL of 0.400 M Na2SO4 solution.

Liquids which are mutually miscible possess intermolecular forces of similar type and magnitude. True False

What is the pH of a 0.00972 M solution of LIOH?

How many moles of O₂ are produced when 0.235 moles of KCIO3 decompose according to the equation 2KCIO3 --> 2KCI + 3O₂?

What is the gram per ml percentage of a 2M HCl solution 12.4 percentage 10 percentage 4.21 percentage 7.29 percentage

Select all the concentration units below that are temperature-independent. There may be more than one correct answer. mole fraction molality (m) molarity percent by mass percent by volume

Based on the moles you have for Salicylic Acid and Acetic Anhydride, determine which one was the limiting Reagent.

2NaOH+ FeCl₂ --> 2NaCl + Fe(OH)2 If 13.5 g of sodium hydroxide reacts with an excess of iron (II) chloride according to the equation above, how much Fe(OH)2 will be produced? 19.72 g 15.17 g 9.86 g 30.33 g

Arrange these aqueous solutions in order of decreasing boiling points: Highest Boiling Point 0.100 m Mg(NO3)2 0.200 methylene glycol, C₂H6O2 0.175 m LiCl

100 mL of a 13 1/2% solution has been prepared, how many mililiters of solution are in 13 1/2 strength solution?

A solution containing 12.9 g of MgCl, is dissolved in water to make a 0.54 L solution. a. What is the molarity of the solution? Show your work! (Hint: Find the moles first!) b. Describe how decreasing the volume would affect the molarity of the solution.

Here is a molecular equation: H₂CO3(aq) + 2 KOH(aq) → 2 H₂O(l) + K₂CO3(aq) Which of the choices below is the right side of the complete ionic equation for this same reaction?

A solution is made up of 86.3g ethylene glycol (C₂H6O₂) in 143.2g of water. Calculate the freezing point of this solution (ΔTf = m X Kf, For water Kf = 1.86 °C/m)