Sodium chloride is commonly used to salt roads. Compare the two salts, CaCl2 and NaCl: Which...
Sodium chloride is commonly used to salt roads. Compare the two salts, CaCl2 and NaCl: Which one is more effective in deicing roads per gram of salt? Back up your answer with calculations.
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Sodium chloride is commonly used to salt roads. Compare the two
salts, CaCl2 and NaCl: Which...
Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride...
Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water by calculating the freezing point depression of solutions containing 230. g of each salt in 1.00 kg of water. (An advantage of CaCl2 is that it acts more quickly because it is hygroscopic, that is, it absorbs...
Consider 1.00 mole of each of the following substances: 1) NaCl (sodium chloride) 2) CaCl2 (calcium...
Consider 1.00 mole of each of the following substances: 1) NaCl (sodium chloride) 2) CaCl2 (calcium chloride) 3) CH3OH (methanol) 4) Naphthalene (C10H8) Answer the following questions: A) Which one of the above substances would likely not change the freezing point of water at all? Explain. B) Which one of the above substances would likely lower the freezing point of water the most? Explain.
10 Which is a nonelectrolyte? a harium nitrate, Ba(NO) bcalcium chloride, CaCl2 c sodium chloride, NaCl...
10 Which is a nonelectrolyte? a harium nitrate, Ba(NO) bcalcium chloride, CaCl2 c sodium chloride, NaCl d.methyl alcohol, CHOH e potassium sulfate, KSO 11 What is the name of the oxoacid: HCIO? a Chloric acid b. Hypochlorous acid c. Hydrochloric acid d. Chlorous acid c. Perchloric acid 12 Which statement is true concerning an oxidation-reduction reaction? a. The reactant which is reduced is the reducing reagent. b. The reactant which is oxidized is the reducing reagent. c. The reactant which...
sodium chloride, calcium chloride, and urea have all been used to melt ice from sidewalks. If...
sodium chloride, calcium chloride, and urea have all been used to melt ice from sidewalks. If each of these substances cost the same per gram which would be the most effective ice melter? (Ignoring environmental factors). Show your work and support your choice.
People commonly dissolve table salt (NaCL) into water that they are heating up. a) If you...
People commonly dissolve table salt (NaCL) into water that they are heating up. a) If you had a pot with 4 quarts of water (before heating) and add 1 teaspoon of salt, which is equivalent to 6.20g, what is the boiling point of the water? How much of an effect will that have on cooking pasta? (You can assume that NaCl fully dissociates. 1quart=0.946 L and Kb=0.51oCkg/mol for water) b) Would the cooking of pasta (based on boiling point) be...
only doupto #4 Tabulate the experimental ratios of the chloride ion contents of the salts tested....
only doupto #4 Tabulate the experimental ratios of the chloride ion contents of the salts tested. Obtain these ratios by dividing the average number of drops of AgNO; required for each solution by the average number of drops required for the NaCl solution. Express the ratios to the nearest tenth. Salt NaCl KCI BaCl2 AICI Ratio 1.0 2. Assuming that sodium chloride has one chloride ion per simplest formula unit. a. Does the data of this experiment show that potassium...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH,...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH, kJ/mol 17.33 25.7 Cost salt per 2.5 kg $55.87 $106.70 LICI -37.03 $157.30 CaCl, -81.6 $119.28 Draw the below table and enter your experimental data for Heat of solution/g of salt. Calculate the cost in cents) of 10g of each salt and write in the table below. Name of Salt Heat of solution/g Cost (in cents) of 10 g of salt for of salt...
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
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...
2) One of the reactions for today's class was the dissolution of solid sodium chloride. NaCl...
2) One of the reactions for today's class was the dissolution of solid sodium chloride. NaCl (s) = Nat (aq) + CI (aq) Use the data from the table to calculate: Substance NaCl (s) Nat (aq) ci" (aq) Hiº (kJ/mol) S (J/mol K) AG (kJ/mol) -411.2 72.13 -384.1 -239.66 60.25 -261.87 -167. 2 5 6.5 -131.2 229 66 1 A) AH RXN B) AS RXN C) AGⓇAXN D) The little circle which looks like the degree symbol (º) is used...
1) In 1 L of Mannitol Salt Agar there are 75 g of sodium chloride. Convert...
1) In 1 L of Mannitol Salt Agar there are 75 g of sodium chloride. Convert this to a weight over volume percentage (%w/v) and report your answer rounded to two decimal places. Do not include units in the answer block. Percent weight over volume (%w/v) is the weight of the solute in grams divided by the volume of the solvent in mL times 100. It is essentially expressing the grams of solute per 100 mL of solvent. 2) In...
10 Which is a nonelectrolyte? a harium nitrate, Ba(NO) bcalcium chloride, CaCl2 c sodium chloride, NaCl d.methyl alcohol, CHOH e potassium sulfate, KSO 11 What is the name of the oxoacid: HCIO? a Chloric acid b. Hypochlorous acid c. Hydrochloric acid d. Chlorous acid c. Perchloric acid 12 Which statement is true concerning an oxidation-reduction reaction? a. The reactant which is reduced is the reducing reagent. b. The reactant which is oxidized is the reducing reagent. c. The reactant which...
only doupto #4 Tabulate the experimental ratios of the chloride ion contents of the salts tested. Obtain these ratios by dividing the average number of drops of AgNO; required for each solution by the average number of drops required for the NaCl solution. Express the ratios to the nearest tenth. Salt NaCl KCI BaCl2 AICI Ratio 1.0 2. Assuming that sodium chloride has one chloride ion per simplest formula unit. a. Does the data of this experiment show that potassium...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH, kJ/mol 17.33 25.7 Cost salt per 2.5 kg $55.87 $106.70 LICI -37.03 $157.30 CaCl, -81.6 $119.28 Draw the below table and enter your experimental data for Heat of solution/g of salt. Calculate the cost in cents) of 10g of each salt and write in the table below. Name of Salt Heat of solution/g Cost (in cents) of 10 g of salt for of salt...
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...
2) One of the reactions for today's class was the dissolution of solid sodium chloride. NaCl (s) = Nat (aq) + CI (aq) Use the data from the table to calculate: Substance NaCl (s) Nat (aq) ci" (aq) Hiº (kJ/mol) S (J/mol K) AG (kJ/mol) -411.2 72.13 -384.1 -239.66 60.25 -261.87 -167. 2 5 6.5 -131.2 229 66 1 A) AH RXN B) AS RXN C) AGⓇAXN D) The little circle which looks like the degree symbol (º) is used...
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