Which of the following statements concerning osmosis is/are CORRECT? If any arc

Question

Which of the following statements concerning osmosis is/are CORRECT? If any arc incorrect, explain why? Which of the following statements is/are CORRECT? If any arc incorrect, explain why Rank the following salts in order from least soluble in water to most soluble in water (1 = least soluble) For which set of values of deltaH and deltaS will a reaction be spontaneous (product-favored) at all temperatures? deltaH = +10kJ, deltaS = minus5 J/K deltaH = minus10kJ, deltaS = minus5 J/K deltaH = minus10kJ, deltaS = +5 J/K deltaH = +10kJ, deltaS = +5J/K no such values exist The following reaction occurs spontaneously. 2 H^+ (aq) + Ca(s) rightarrow Ca^2+ (aq) + H_2(g) Write the balanced oxidation half-reaction. How many electrons are transferred in the following reaction? Ni + 2HCl rightarrow NiCl_2 + H_2 Why does HCI not have a specific value for K_a on the table of acid dissociation contants? Write a balanced chemical equation for the overall reaction represented by the cell notation below Mn(s) | Mn^2+ (aq) || Zn^2+ (aq) | Zn(s)

Explanation / Answer

I have a doubt with question 25.

Question 26.

Only the second statement is incorrect, because when k <<<1 this means that concentrations in reactants is very high compared to concentrations of products, and therefore, the reaction will favor the reactants and go to the left.

Question 27,.

According to solubility rules, all carbonates are soluble in water, so this is the most soluble, followed by silver, and finally the lead sulfide, because sulfides are insoluble in water according to the solubility rules

Question 28.

In order to know this, we can calculate dG:
dG1 = 10000 - (300*-5) = 11500 J/mol --> non spontaneus
dG2 = -10000 - (300*-5) = -8500 J/mol ---> spontaneus
dG3 = -10000 - (300*5) = -11500 J/mol ---> spontaneus
dG4 = 10000 - (300*5) = 8500 J/mol ---> non spontaneus.

However, even through 2 and 3 are spontaneus at that temperature, if we modify the temperature to a higher or lower temperature, it could become non spontaneus, therefore, there are no such value for an spontaneity to occur at any temperature.

The other questions post them uin another question thread.

Hope this helps

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