(BONUS QUESTION) In the copper complexes investigated, the water and ammonia molecules act as Lewis bases (electron pair donors)
; they provide both of the electrons that form the covalent bonds between the Cu2+ ion and each ligand. Which ligand (H2O or NH3) is the stronger Lewis base? Explain your answer in terms of your answers for questions 3a and 3b. (hint: the poorer an oxidizing agent a species is, the harder it it to reduce that species. Hint #2: the copper complexes are reduced by gaining an electron.)
1 answer:
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Answer:
Here's what I get
Explanation:
(g) Titration curves
I can't draw two curves on the same graph, but I can draw two separate curves for you.
The graph in part (d) had an equivalence point at 20 mL.
In the second titration, the NaOH was twice as concentrated, so the volume to equivalence point would be half as much — 10 mL.
The two titration curves are below.
(h) Evidence of reaction
HCl and NaOH are both colourless.
They don't evolve a gas or form a precipitate when they react.
The student probably noticed that the Erlenmeyer flask warmed up — a sign of a chemical change.
