12 Which of the following aqueous A) 1.0 m sucrose D) 1.0 m MgCa solution would
ID: 303994 • Letter: 1
Question
12 Which of the following aqueous A) 1.0 m sucrose D) 1.0 m MgCa solution would have boiling point closest to 1.0 m aq KBr? B) 0.5 m CH3OH C) 0.5 m Na 5 E) 1.0 m NH4NO3 13 For the reaction: 2Alg) + B(g) ? C(g) Rate-k[A][B] Which of the following statements is/are true when temperature is increased at constant volume? I [A] decreases at a greater rate Il. IlI. The value of k, rate constant, remains the same IV. The effectiveness of collisions between reactant molecules increases The rate of reaction increases A) I, I, 1 B) I, IV C)I, D) II, III E) II, II IV A solution is prepared by dissolving 0.500 g of nonelectrolyte in 12.0 g of cyclohexane. The freezing point dispersion of the solution is 8.95°C The K, for cyclohexane is 20.0C/m. The molar mass of nonelectrolyte in g/mole is: A) 128 B)182 C) 112D) 93.2 E) 20.5 14 15 The solubility of MnSO.H20 in water at 20°C is 50.0g/100g of water. A solution at 20°C that solution. (The MM of is 2.0 m in MnSO4.H20 is best described as MnSO4.H20 168.97 g/mol) A) unsaturated B) hydrated C) saturated D) solvated E) supersaturatedExplanation / Answer
I am solving the first question, Q12 as per Chegg guidelines, post multiple question to get the remaining answers
Q12)
KBr is an electrolyte, so it will dissociate into ions K+ and Br-, having the value of i equal to 2
Increase in boiling point = i * Kb * m = 2Kb
1.0m sucrose (it is a non-electrolyte, hence the value of i will be equal to 1, so the temperature increases will be 1Kb)
0.5m CH3OH(it is a non-electrolyte, hence the value of i will be equal to 1, so the temperature increases will be 0.5Kb)
0.5m Na2S(it is a electrolyte, hence the value of i will be equal to 3, so the temperature increases will be 1.5Kb)
1.0m MgCl2(it is a electrolyte, hence the value of i will be equal to 3, so the temperature increases will be 3Kb)
1.0m NH4NO3it is a electrolyte, hence the value of i will be equal to 2, so the temperature increases will be 2Kb)
Hence the correct answer is Option E
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.