1,O2 gas contributes 21 % partial pressure in the atmosphere. What is the solubility of O2 in sea water
at sea level and 25 o
C, if kH of O2 at 25 o
C is 1.20 x 10 –3 M atm.?
2, A. The solubility of AgNO3 at 10 o
C is 170 g and at 20 o
C is 222 g. Is the dissolution of AgNO3
exothermic or endothermic? Give reason for your answer.
B. ΔH solution of NaI is – 7.50 kJ / mol. Is NaI more soluble at 20 o
C or at 60 o
C? Why?
3, Assign each lattice energy value to the appropriate ionic compound.
MgI2 / LiI / NaI / MgF2 / MgO 2327 kJ / 757 kJ / 2957 kJ / 3923 kJ / 707 kJ
Answers: 1
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Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?
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How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
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1,O2 gas contributes 21 % partial pressure in the atmosphere. What is the solubility of O2 in sea wa...
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