110. Hg2+ +MgY2- HgY2- + Mg2+ is an example of what kind of titration? a) direct

Question

110. Hg2+ +MgY2- HgY2- + Mg2+ is an example of what kind of titration?

a) direct

b) back

c) displacement

d) indirect

e) masking

111. Which of these represent and A Lewis acid and B Lewis base?

a) A = Na+ B = Sr3+

b) A = Cl- B = Sr3+

c) A = F- B = Ne

d) A = Al3+ B = NO3-

e) A = Cl- B = NO3-

112. What is true about a Lewis acid and Lewis base?

a) the acid donates protons and the base accepts protons

b) the acid accepts electrons and the base donates electrons

c) the acid produces H3O+ in solution and the base produces OH- in solution.

113. What is true about an Arrhenius acid and an Arrhenius base?

a) the acid donates protons and the base accepts protons

b) the acid accepts electrons and the base donates electrons

c) the acid produces H3O+ in solution and the base produces OH- in solution.

Explanation / Answer

Hello
The answer for 110 is C, it is a displacement (you can see the Hg2+ displaced Mg2+
111) The answer is D, Al3+ is a Lewis acid because it can accept electrons (has low electronic density) and NO3- is a Lewis base because it can donate electrons (has high electronic density)
112) The answer is B, purely theoretical and very related to number 111
113) The answer is C, the definition of Arrhenius acid and base, you can see it is the least general definition (also the oldest).

Hope it helps

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