(1) Multiple Choice (1 point each) Which of the following is soluble in water at
ID: 578015 • Letter: #
Question
(1) Multiple Choice (1 point each) Which of the following is soluble in water at 25? (a) AgNO (b) PbClh (c) AgCI (d) AgS (e) Hg Ch 1. 2. With which of the following will the Sodium ion form an insoluble salt? (a) Acetate (b) Phosphate c) Sulfate (d) lodide (e) Sodium will form soluble salts with all choices. 3. What are the spectator ions in the reaction between KCI (aq) and AgNO,(aq)? (a) K and Ag+ (b) Ag and Cl (c) K and NOr (d) Ag and NOs (e) K only when aqueous solutions of (a) KSOu and CrCl (b) Nal and KBr (c) NiBr: and AgNO (d) Li:COs and Csl (e) KOH and Ba(NO) 4, are mixed, a precipitate forms. 5. Which of the following are strong electrolytes? HCI HC.HO NHs KCI (a) HCI, KC (b) HCHO, KCI (c) HCL, HC.HO, KC (d) HCL, HC.HO, NHs, KCI (e) HCL NHs,KC 6. When aqueous solutions of Pb(NOp and NaCI are mixed, PbCla precipitates. The balanced net ionic equation is (a) br (aq) + 2NO (aq) Pb(NO)2 (s) (b) Per (aq) + 2NOr (aq) Pb(NO)2 (aq) (c) Pta. (aq) + 2Cl (aq) PC12 (s)Explanation / Answer
Solubility rules:
- Most alkali metal (group I metals) are always soluble
- Cations/Anions such as NH4+, HCO3-; ClO3-, NO3- are always soluble
- Most halides are soluble, F-,Cl-,Br-,I-, exceptions = Ag+, Hg2+2, Pb+2 compounds
- Most sulfates are soluble (SO4-2); exceptions = Ag+, Ca+2, Sr+2, Ba+2, Hg2+2, Pb+2 compounds
- In general (except all alkali metals) these ions will NOT be soluble: PO4-3, CrO4-2, S-2, CO3-2
Q1
a) nitrates are soluble
b) Lead halides are NOt soluble
c) silver halides are not soluble
d) silver sulfides not soluble
e) Merucry halides are not soluble
choose AGNO3
Q2
note that, as stated before, sodium is always soluble
Q3
spectator ions --> will not form preciptiate
KCl + AgNO3 = AGcl + KNO3
KNO# = soluble so, K+ and NO3-
Q4
from the list
only
Ag+ + Br- = AgBr forms precipitate
Q5
strong electrolyte will dissociate 100%
then
HCl, KCl only
Q6
net ionic equation: only reactings epceis, that is Pb+2 and Cl- mustb e rpesent
from the list
choose C
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