Solutions Questions and Answers

A 0 592 g sample of a metal M reacts completely with sulfuric acid according to M s H SO aq MSO aq H g A volume of 269 mL of hydrogen is collected over water the water level in the collecting vessel is the same as the outside leve Atmospheric pressure is 756 0 Torr and the temperature is 25 C The vapor pressure of water at 25 C is 23 8 Torr Calculate the molar mass of the metal molar mass g m

if I need 0 045 moles of AlBr3 for a reaction how many grams should I weigh out on the balance

Vapor pressure mm Hg 900 800 700 600 500 400 300 200 100 0 10 Carbon disulfide 20 30 Methanol 40 Ethanol 60 70 Temperature C 50 Heptane The intermolecular forces in chloroform are 80 90 100 110 400 mm Hg at 42 0 C From the plot of vapor pressures vs temperature above estim The vapor pressure of chloroform temperature at which the vapor pressure of methanol is 400 mm Hg C than the intermolecular forces in methanol

V3 7 8 Which solution has the higher boiling point 0 600 M NaCl in water or 0 500 M Cabr2 in water Explain 1 x Imole Macl x0 51c 5 24V x 10 C

The vapor pressure of liquid cadmium is 400 mm Hg at 983 K Assuming that its molar heat of vaporization is constant at 99 0 kJ mol the vapor pressure of liquid Cd is mm Hg at a temperature of 1 01x10 K

The substance xenon has the following properties normal melting point 161 3 K normal boiling point 165 0 K triple point critical point Choose all that apply A sample of xenon is initially at a pressure of 62 4 atm and a temperature of 140 7 K The pressure on the sample is reduced to 0 370 atm at a constant temperature of 140 7 K Which of the following are true 0 37 atm 152 0 K 57 6 atm 289 7 K O No phase change will occur O The liquid initially present will solidify The sample is initially a solid O The final state of the substance is a gas The final state of the substance is a solid

A solution is made by dissolving 0 718 mol of nonelectrolyte solute in 843 g of benzene Calculate the freezing point T and boiling point Th of the solution Constants can be found in the table of colligative constants T C

Unknown concentration calculate the unknown concentration M of 20 00 mL CH3COOH that was titrated with 0 202 M NaOH Show appropriate stoichiometric calculations

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)

On the phase diagram shown to the right, corresponds to the conditions segment of temperature and pressure under which the solid and the gas of the substance are in equilibrium. A. AB B. CD C. AC D. BC E. AD

A saturated solution of a salt was made by adding 36.00 g to 150.0 g water. There was 5.00 g of salt on the bottom that didn't dissolve. What is the % solubility of the salt? The mass of the salt that dissolved is

A 1:25 dilution is done with a 2.500 M Na₂SO4 solution. How many mL of the 2.500 M solution are required to make 3.000 L of the diluted solution? A. 0.1200 mL B. 120.0 mL C. 75.00 mL D. 7.500 x 104 mL

The osmotic pressure of a 0.0150 M MgCl₂ solution at 25 °C is 0.982 atm. Calculate the van't Hoff factor of this solution. And then compare to ideal van't Hoff factor.

Determine and explain the van't Hoff factor for (NH4)3PO4 assuming 100% dissociation.

The freezing point of pure benzene (C6H6) is 5.49 °C. The freezing point of a solution made using toluene (C₂H₂) in benzene is determined to be -13.0 °C. What is the molality of the toluene? (Kf benzene = 5.12 °C/m)

2.2 mol hexane (C6H14) is mixed with 1.6 mol heptane (C7H16) at 300 K. Determine the: i) Gibbs energy of mixture ii) entropy of mixture iii) enthalpy of mixture iv) whether this solution is an ideal solution or real solution

20.00 mL of HNO3 is titrated to the end point with 22.19 mL of 0.200 M Ba(OH)2. What is the concentration of the acid? Hint: Start with the balanced reaction equation! Report your answer with three significant figures. Do NOT include units in your answer.

When a gas condenses, heat is released absorbed endothermic immersed

A solution is made by dissolving 44.5 g glycerol, C3H8O3, into 500.0 mL water. Assuming that the total solution volume is 516 mL, calculate the osmotic pressure of this solution at 25 °C.

The vapor pressure of ethanol is 58.7 torr at 25 °C. Determine the vapor-pressure lowering, AP, of an ethanol solution that contains 0.125 mol sucrose dissolved into 1.545 mol ethanol. 0.925 torr 2.13 torr 4.39 torr 12.4 torr 54.3 torr

Calculate the moles of NaOH added. Hide Hint Hint: Molarity = moles/volume Rearranges: Volume x molarity = moles Make sure to change mL to L before using the formula since molarity is in mol/L moles NaOH

Determine the total vapor pressure of a solution consisting of 0.137 mol dichloromethane, CH₂Cl2, and 0.255 mol pentane, C3H12, at 25 °C. The pressures for these liquids at 25 °C are Pº dichloromethane = 435 torr and Pºpentane = 514 torr

The normal boiling point of a solution containing 105.5 g of a nonionic solute and 625 g water is 102.70 °C. Calculate the molar mass of the solute. The boiling point elevation constant, Kb, of water is 0.512 °C/m.

Neutralization Reaction: NaOH + HC₂H3O2 → NaC₂H3O2 + H₂O To standardize a 20.0 mL vinegar solution in a flask, a student used 14 mL of a 0.30 M solution of NaOH to neutralize the vinegar. Determine the molarity of the acid (vinegar solution). Calculate the moles of NaOH added.

Determine the minimum volume of 0.450 mol/L copper(II) sulfate, CuSO4(aq), that is required to react completely with all the sodium ions in 250.0 mL of a 0.326 mol/L sodium carbonate, Na2CO3, solution. Show your work and explain each step.

Describe what It looks like when a supersaturated solution starts to crystallize.

Look at the data you gathered from the solubility experiment you just performed. Are calclum and sulphate lons more attracted to water or to each other?

Sodium hypochlorite (NaCIO) is the main ingrediant in chlorine bleach. a) What mass of sodium hypochlorite (NaCIO) is required to prepare 3.5 L of chlorine bleach, if the bleach is a 0.40 mol/L solution of sodium hypochlorite? b)What is the final concentation if you diluted the above sample (3.5L of 0.40 mol/L) to a final volume of 5.5 L?

How can you cause a supersaturated solution to crystallize?

In a chemical reaction 20 mL of 0.50 mol/L potassium hydroxide and 20 mL of 1.75 mol/L calcium nitrate were added together. Ca(NO3)2 + KOH --> Ca(OH)2 + KNO3 a) Balance the reaction include subscripts (1 mark) b) Find the mass of the precipitate (4 marks) c) What was the limiting reagent? (1 marks) d) Write the net ionic equation of the reaction

If a solution has only a small amount of koolaid dissolved in water and its very light in color and weak in flavor is it dilute or concentrated? WHY? (use the definition to explain)

I. Know the components of a solution and how to describe solutions qualitatively (lecture 1) 1. In the solution soda which is composed of mostly water, with CO2, sugar, flavorings, and color dissolved in it what is the solvent? What are the solutes?

Why Is It Important for materials to attract each other in order for dissolution to occur?

Which of the following compounds is capable of forming hydrogen bonding? CH3AND3 CH3RED3 CH3OH CH3F

Solubility of sugar is 2000 g/L at 25 °C. How Marcus can prepare a super saturated solution of sugar of 1 L? Marcus should take 1000 g of sugar and dissolve in 1 L of water at 25 °C. Marcus should take 2000 g of sugar and dissolve in 1 L of water at 25 °C. Marcus should take greater than 2000 g of sugar and dissolve in 1 L of water at 25 °C. Marcus should take greater than 2000 g of sugar and dissolve in 1 L of water at higher temperature than 25 °C.