Question

a. What would you predict about the reactivity of potassium in hydrochloric acid compared to potassium...

a. What would you predict about the reactivity of potassium in hydrochloric acid compared to potassium in water?

b. Which atom would you expect to have the largest radius, boron or carbon? What about between phosphorus or arsenic? Explain.

c. Which atom would you expect to have the largest first ionization energy, phosphorus or arsenic? Explain your reasoning.

d. Based on your findings, between which ionization energies would you expect to have the largest increase for gallium? Consider the 1st, 2nd, 3rd, 4th, 5th, 6th, or 7th ionization energies. Explain your reasoning.

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Homework Answers

Answer #1

a) Potassium reacts with water and evolves H2 gas while the reaction of K with HCl is explosive. Hence the reactivity of K is more in HCl than water

b) Boron has large radius than Carbon due to low nuclear charge in Boron than Carbon

The Size of Arsenic is larger than Phosporous due to the presence of an extra shell in Arsenic than P

c) The 1st Ionization energy of P is greater than Arsenic due to small size of P than As which requires more energy to remove an outermost electron

d) Gallium valence shell electronic ocnfiguration is nS2 nP3. Hence it can have 5 ionization energy values and the increased order of IE's are IE1<IE2<IE3<IE4<IE5

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