Chapter 13 Concept Check

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Use the solutions listed to answer the questions that follow. A. 50. mL of 0.50 M NH3 (Kb = 1.8 x 10-5) B. 50. mL of 0.75 M NaOCl C. 50. mL of 0.50 M NaOH D. 50. mL of 0.50 HCl E. 50. mL of 1.0 M M HOCL (Ka = 3.5 x 10-8) 1. Write the equation that represents the chemical reaction occurring when solutions A and D are combined. 2. Select the combination(s) of solutions that will produce a "best buffer solution" with pH = pKa 3. Determine the pH of the solution that results when solutions B and C are combined.

(Choose one answer for each) ____________ is a type of colloid that is formed when a liquid is dispersed in a gas gel emulsion sol aerosol foam Which of the following statements describes the process of coagulation? The dispersed phase of an association colloid aggregrates and forms a micelle. The dispersed phase of an association colloid aggregrates and forms a hydrophobic colloid. The dispersed phase of an association colloid aggregrates and forms a hyrdophillic colloid. The continous phase of a colloid aggregates and separates from the dispersed phase. The dispersed phase of a colloid aggregrates and separates from the continous phase. ____________ forces is/are responsible for capillary action, a property of liquids?  surface tension of the liquid attractive forces between the liquid and the capillary material and surface tension of the liquid viscosity of the liquid viscosity of the liquid and surface tension of the liquid

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1) Listen What is the concentration of a 100 mL methanol solution containing 0.025L of methanol (d = 0.792 g/mL)? O a) 6.18 M O b) 4.94 M O) 4.94 x 10 3 M. Previous Page Next Page Page 12 of 19 PM

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Use the solutions listed to answer the questions that follow. A. 50. mL of 0.50 M NH3 (Kb = 1.8 x 10-5) B. 50. mL of 0.75 M NaOCl C. 50. mL of 0.50 M NaOH D. 50. mL of M 0.50 HCl E. 50. mL of 1.0 M M HOCL (Ka = 3.5 x 10-8) 1. Select the combination(s) of solutions that will produce a buffered solution (select all that apply). 2. Select the combination(s) of solutions that will result in a solution whose pH = 7.

Use the solutions listed to answer the questions that follow. A. 50. mL of 0.50 M NH3 (Kb = 1.8 x 10-5) B. 50. mL of 0.75 M NaOCl C. 50. mL of 0.50 M NaOH D. 50. mL of M 0.50 HCl E. 50. mL of 1.0 M M HOCL (Ka = 3.5 x 10-8) 1. Select the combination(s) of solutions that will produce a buffered solution (select all that apply). Please give me an answer from A through E.

Question 5 7 List the solutions below in order of increasing boiling point (lowest to highest). For example, you would list "W X Y Z" if you thought they were already in order. X Y 0.200 m 0.100 m CH3OH CH3OH Hint: You aren't looking at delta T but instead Tf. These are solutions made of mostly water. W 0.050 m CH3OH Z 0.150 m CH3OH A/

I Review | Constants | Periodic Table Determine the volume, in milliliters, required to prepare each of the following diluted solutions: Part A 259 mL of a 0.200 M HNO3 solution from a 4.00 M HNO3 solution Express your answer with the appropriate units. HA ? Value Units Submit Request Answer Part B 713 mL of a 0.100 M MgCl, solution using a 6.50 M MgCl, solution Express your answer with the appropriate units. µA ? Value Units

Select the solution with the lowest boiling point a) 0.2 M CaCl2 b) 0.2 M C2H6O2 C) Pure water d) 0.2 M AlCl3 e) 0.2 M NaCl2

Which of the following solutions will have the lowest boiling point?   Question 10 options:   0.15 mol L-1 (NH4)2SO4   0.20 mol L-1 Fe(NO3)3   0.20 mol L-1 KClO3   0.15 mol L-1 NH4NO3

isited Match the following aqueous solutions with the appropriate letter from the column on the right. 1.0.17 m MgI2 A. Lowest freezing point 2.0.14 m Pb(CH3COO)2 B. Second lowest freezing point C. Third lowest freezing point 3.0.23 m NaOH 4.0.49 m Ethylene glycol (nonelectrolyte) D. Highest freezing point Submit Answer 08-30-2....pdf H [References] Use the References to access important values if needed for this question. Retry Entire Group 9 more group attempts remaining a 6 Previous Nex 4x +

Dissolving a solute such as LiOH in a solvent such as water results in ___. Group of answer choices no change in the boiling point of the liquid. decrease in the vapor pressure of the liquid. an increase in the freezing point of the liquid. an increase in the melting point of the liquid. a decrease in the boiling point of the liquid

Which response lists all the following pairs that are miscible liquids. ( Will form a solution when mixed)        Pair # 1. octane (C8H18) and water        Pair # 2. acetic acid (CH3COOH) and water        Pair # 3. octane (C8H18) and carbon tetrachloride (CCl4)   Select one: a. 2 b. 1, 2 c. 2,3 d. 3 e. 1, 3

Question 10 When a nonvolatile solute such as ammonium sulfate is dissolved in a solvent like water, one of the observed effects is an increase in the vapor pressure of the solute. scattering of light beams by the solute particles in the solution. an increase in the freezing point of the liquid. a decrease in the vapor pressure of the solvent. E a decrease in the boiling point of the liquid.

A 500.0-mL sample of pure water is allowed to come to equilibrium with pure oxygen gas at a pressure of 755 mmHg. What mass of oxygen gas dissolves in the water? (The Henry’s law constant for oxygen gas at 25°C is 1.3 * 10-3M/atm.)a) 15.7 g b) 6.5 * 10-3 g c) 0.041 g d) 0.021 g

A solution is made by adding 58.44 grams of sodium chloride to 1.000 liters of water.  Which of the following statements is true?  The [NaCl] will be below 1.000M,  The [NaCl] will be 1.000M - NOT CORRECT ANSWER,  The [NaCl] will be above 1.000M,  None of the above

27. Find the freezing point of a solution of 990 g of CH3OH in 2.5 kg of water. Use the water f.R-depression constant: K(H,0) = = 1.86 °C/{mol(solute)/kg(solvent)} A) +123 °C B) +77 °C C) +23 °C D) -0.74 °C E) -23 °C

an acetic acid solution is 4.00M and has a density of 1.04g/mL. what is the mass/mass percent concentration of HC2H3O2(60.06g/mol) a) 0.347%b) 0.375% c) 37.5% d) 23.1% e ) 36.0%

Given chart attached Calculate the number of moles of base (NaOH) required to reach the endpoint

Chemistry Because the three possible unknowns (cinnamic acid, vanillin and 4- hydroxybenzaldehyde) have either carboxylic acid or phenol functional groups, they are all weak acids. • How will this weak acidity affect the freezing point depression? [Select] • What is the source of this affect? [Select] • How will the calculated molecular mass differ from the actual value? [Select] Because the three possible unknowns (cinnamic acid, vanillin and 4- hydroxybenzaldehyde) have either carboxylic acid or phenol functional groups, they are all weak acids. • How will this weak acidity affect the freezing point depression? [Select] [Select] The solution freezing point is lower than it should be. The solvent freezing point is higher than it should be. The solvent freezing point is lower than it should be. The solution freezing point is higher than it should be. value? [Select] n the actual