11/2/2017 11:55 PM A 30.5/10o 11/1/2017 03:32 PM Print Calculator -a Periodic Ta

Question

11/2/2017 11:55 PM A 30.5/10o 11/1/2017 03:32 PM Print Calculator -a Periodic Table Question 10 of 16 Sapling Learning Map with a strong acid, a weak acid titrated with a sirong base, a weak base itraied with a strong acid, or a polyprotic acid titrated with a strong base. acid titrated with a strong base, a strong base titrated Strong acid/ Strong baseWeak acid/Weak base/ strong base strong acid strong base baselPolyprotic acid/ strong acid mL of titrant mL of titrant ml of titrant mL of titrant mL of titrant

Explanation / Answer

First, choose from lef tto right ( graphs) A,B,C,D,E

a)

strong acid --> must start pH acidic, i.e. < 7

choose between

c, d,e

ignore d, since it is diprotic

choose e, since pH in equivlaence point is 7

b)

strong base + strong acid --> starts basic, so choose between a and b

ignore a, since it has a buffer zone

therefore, choose b

c)

Weak acid --> must be basic

strong base --> expect buffer zone

from c,d,e, ignore e, since it has been selected, ignore d since it is dirpotic

choose C

d)

weak base + strong acid; expec tbasic media, then buffer area

from the list,

must be "A" since it is basic + buffer zone present

e)

polyprotic acid --> must have at least 2 points in equivalence

choose "D" since it has 2 points

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