The stepwise formation constants for complexes of nh3 with [cu(oh2)6]2+ (aq) are logk11 = 4.15, log k12= 3.50, log k13 = 2.89, log k14 = 2.13, log k15 = -0.52. suggest a reason why kt5 is so different? (10)

K₅ is smaller because the reaction is slower due to steric and electronic effects.

Explanation:

K is the rate constant of the reaction. The higher the value of log K, the higher the value of K and the faster is the reaction.

The reaction can be represented by the following reaction:

6 NH₃ + [Cu(OH₂)₆]²⁺ → [Cu(NH₃)₆]²⁺ + 6 H₂O

This means that the reaction is exchanging the H₂O ligands by NH₃ ligands.

The more NH₃ ligands we add to the complex, the more difficult (slower) is the substitution. This happend because the addition of NH₃ ligands promotes a steric hindrance and electronic repulsion, which makes it harder for the next NH₃ to approach the complex and substitute the H₂O ligand.

This is the reason why K₅ is negative. The rate of this substitution is extremelhy low.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.