You are given three bottles labeled a, b, AND c. The bottles contain pentane (C5H12, a...
You are given three bottles labeled a, b, AND c. The bottles contain pentane (C5H12, a liquid), calcium chloride (CaCl2) solution, and aqueous ammonium hydroxide (NH4OH, ammonia dissolved in water). Describe a procedure to identify which liquid would be in each bottle.
Homework Answers
We can distinguish them by measuring their conductivity. By dissolving Pentane we won't get ions, Calcium chloride we get 3 ions & aqueous ammonium hydroxide we get 2 ions. Hence, in the case of equal concentrations, the order would be
Pentane< NH4OH< CaCl2
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You are given three bottles labeled a, b, AND c. The bottles
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4. You will conduct the two solvation reactions and three neutralization reactions in this experiment. In...
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Given 100. mL of each of the three aqueous buffer solutions: Buffer A is 0.50 M...
Given 100. mL of each of the three aqueous buffer solutions: Buffer A is 0.50 M in ammonia and 0.10 M in ammonium chloride; Buffer B is 0.50 M in ammonia and 0.50 M in ammonium chloride; and Buffer C is 0.50 M in ammonia and 1.0 M in ammonium chloride. To each of the 100. mL samples is added 1.0 mL of 6.0 M hydrochloric acid. Which buffer solution will show the smallest change in pH? Explain why.
Academic Year 2019-2020 Chemical Reactions and Writing Chemical Equations Post Lab Questions (10 Points). Answer the...
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explain in detail, please. A23. What is the expression you would develop to calculate the molar...
explain in detail, please.
A23. What is the expression you would develop to calculate the molar solubility, s, of Ca(OH)2 in a 0.2 M CaCl2 solution? (A) 0.45 + 282 (B) 483 (C) 0.452 + 253 (D) 0.852 + 453 (E) 0.252 + s3 A24. A chemist separately measures out 3 x 10-4 mol calcium chloride, 3 x 10-4 mol magnesium chloride and 1.8 x 10-3 mol sodium hydroxide and dissolves each one of these in a volume of 100...
NaCl=20.9 C KCl=20.4 C CaCl2=20.4 C III. Calculations Given the following thermodynamic data, calculate AHⓇ, AS,...
NaCl=20.9 C
KCl=20.4 C
CaCl2=20.4 C
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Chemical Reactions For each reaction you observed, the names of the reactants and products are given...
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Solutions and Dilutions 1. What would be the percent (%) concentration of a solution that results...
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4. You will conduct the two solvation reactions and three neutralization reactions in this experiment. In the space provided below, write the balanced net ionic reaction equations from the descriptions. Use the table of thermodynamic data in your text (AHf(NaOH(s)= -425.61 kJ-mol) to calculate the molar enthalpy of the reactions. These will be the accepted values you will compare to the experimental values you calculate using data collected during the experiment. Part I: Solid sodium hydroxide is combined with water...
Given 100. mL of each of the three aqueous buffer solutions: Buffer A is 0.50 M in ammonia and 0.10 M in ammonium chloride; Buffer B is 0.50 M in ammonia and 0.50 M in ammonium chloride; and Buffer C is 0.50 M in ammonia and 1.0 M in ammonium chloride. To each of the 100. mL samples is added 1.0 mL of 6.0 M hydrochloric acid. Which buffer solution will show the smallest change in pH? Explain why.
Academic Year 2019-2020 Chemical Reactions and Writing Chemical Equations Post Lab Questions (10 Points). Answer the following question on this sheet or in your laboratory notebook. In lab you are given 4 bottles, each containing about 5 grams of a white substance. Near the bottles are four labels indicating each bottle contains a high purity substance. Assume these labels belong to the bottles and that each bottle contains a single substance. The four bottles contain glucose (C6H1206), sodium chloride (NaCl),...
Three bottles A, B, and C have been found, each of which contains a
liquid and is labeled \"amine C8H11N.\" As an expert in amine
chemistry, you have been hired as a consultant and asked to
identify each compound. Compounds A and B give off a gas when they
react with NaNO2 and HCl at 0 ℃; C does not. However, when the
aqueous reaction mixture from the diazotization of C is warmed, a
gas is evolved. Compound A is...
2. Write the chemical formulas for the following: b. aluminum a. copper c. hydrochloric acid e. copper(II) chloride g. sodium hydroxide i. hydrogen k. carbon dioxide m. calcium carbonate o. aluminum chloride q. calcium chloride d. magnesium sulfate – f. sodium bicarbonate h. methane j. sodium chloride 1. oxygen n. magnesium hydroxide p. sodium carbonate — r. water t. carbon monoxide S. sodium v. iron u. sulfur w.iron (II) sulfide y. sulfuric acid x. magnesium chloride z. sodium sulfate 3....
explain in detail, please.
A23. What is the expression you would develop to calculate the molar solubility, s, of Ca(OH)2 in a 0.2 M CaCl2 solution? (A) 0.45 + 282 (B) 483 (C) 0.452 + 253 (D) 0.852 + 453 (E) 0.252 + s3 A24. A chemist separately measures out 3 x 10-4 mol calcium chloride, 3 x 10-4 mol magnesium chloride and 1.8 x 10-3 mol sodium hydroxide and dissolves each one of these in a volume of 100...
NaCl=20.9 C
KCl=20.4 C
CaCl2=20.4 C
III. Calculations Given the following thermodynamic data, calculate AHⓇ, AS, and AG for the dissolution of each salt in Part 1. Use the initial temperature you recorded in lab for the AG calculation. NaCl (s) KCI (s) CaCl2 (s) Na* (aq) Ca2+ (aq) Cl(aq) K+ (aq) AH° (kJ/mol) Sº (J/mol K) 411. 1 7 2.12 -436.7 82 -795.4 108.4 -239.66 60.2 -542.8 -53.1 -167.46 55.1 -251.2 103 PROCEDURE Part 1. Dissolution of Salts In...
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