Due 10/30/2017 4.18 Specify what lons are present upon dissolving lowing substan

Question

Due 10/30/2017 4.18 Specify what lons are present upon dissolving lowing substances in water (a) Mgl, (b) K,co,(c) HCIO (d) NaCH,COO each of the fol 4.29 You know that an unlabeled bottle contains an aqueous solution of one of the following AgNO, Cadl, or Al (SO,)s A friend suggests that you test a portion of the solution with Ba(NO,h and then with NaCl solutions. According to your friend's logic which of these chemical reactions could occur, thus helping you Identify the solution in the bottle? (a) Barlum sulfate could pre cipitate. (b) Silver chloride could precipitate. (c) Silver sulfate could precipitate. (d) More than one, but not all, of the reactions described in answers a-c could occur. (e) All three reactions de- scribed in answers a-c could occur 4.21 Using solubility guidelines, predict whether each of the fol- lowing compounds is soluble or insoluble in water: (a) MgBr (b) Pbl, () (NH),CO, (d) Sr(OH),(e) Znso, 4.22 Predict whether each of the following compounds is solu- ble in water: (a) Agl. (b) Na,CO,(c) Bacl, (d) Al(OH)s (e) Zn(CH, COO) 4.38 Classify each of the following aqueous solutions as a non- electrolyte, weak electrolyte, or strong electrolyte: (a) LiClo (b) HCIO, (c) CH,CH,CH,OH (propanol), (d) HClO (e) Cuso, (0 CaHO, (sucrose), 4.51 Which element is oxidized and which is reduced In the fol- lowing reactions? (a) N (e) + 3H-(e) 2 NH () (b) 3 Fe(NO),(aq) + 2 Al(s)--. 3Fe(s) +2 AI(NO,)(ag) (c) Cl,(ag) + 2 Nal(ag)1(ng)+ 2 NaCI(ag) (d) Pts(s) + 4H(aq)-Plso,(s) + 4 Hour) 4.43 Magneslum carbonate, magnesium oxide, and magnesium hydroxide are all white solids that react with acidic solu- tions. (a) Write a balanced molecular equation and a net lonic equation for the reaction that occurs when each sub stance reacts with a hydrochloric acid solution serving the reactions in part (a), how could you distinguish any of the three magneslum substances from the other two? As K,O dissolves in watef, the molecales to form bydroxide ions (a) Write the molecular and net initions of acid and base, what ion is the base in this reaction (9 What is the acid in the teaction? (d) What is the spectator 144 oxide ion reacts with water onic equations for this reaction. (b) Eased on the def

Explanation / Answer

Q4.18

a)

MgI2 dissolves in water into Mg2+ and 2I- ions, which are Magnesium ions + iodide ions

b)

K2CO3 dissolves partially into 2K+ ions, and CO3-2 which are called, Potassium ions, carbonate ions

c)

HClO4 is strong acid, dissociates into H+ and ClO4-, which are called Hydronium ion ( H+ form H3O+) and perchorate ion (ClO4-)

d)

NaCH3COO will form Na+ + CH3COO-

Na+ = sodium ion

CH3COO- = acetate ion

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