Question

Report Sheet Reactions in Aqueous Solutions: Metathesis Reactions and Net Tonle Equations 2. Crystal shape_ Needles 3. Identity of crystals 4. Temperature of filtrate 52°C 5. Crystal shape of second batch 6. Identity of second batch of crystals 7. Crystal shape of third batch 8. Identity of third batch of crystals QUESTIONS Y. Which of the following reactions are metathesis reactions? (a) 2KCIO, — 2KCI +302 (b) Cu(NO3)2 + Zn — Cu + Zn(NO)2 (c) BaCO3 + 2 HCI BaCl,H,O+CO, (d) Na,Co, +CuSO4- Na,so,+CCO, 2a. How many grams of each of the following substances will dissolve in 100 ml. of cold water? Consult a handbook or the Internet and cite your source. Ce(10) Raso. Pb(NO) (NH4)2SO. 2b. Which of these substances is least soluble on a gram-per-100 ml basis? V 3. Suppose you have a solution that might contain any or all of the following cations: Cu". A . Bar and Mn. The addition of HBr causes a precipitate to form. After the precipitate is separated by filtration, H,804 is added to the supernatant liquid, and another precipitate forms. This precipitate is separated by filtration, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates? Which cations are not present in the original solution? 4. Write balanced net ionic equations for the reactions, if any, that occur between (6) Fe,S.(i) and Bradl K,CO,(aq) and Cu(NO3)2(aq). (c) Fe(NO,)2(aq) and HCl(ag), and (d) Bi(OH),(s) and HNO, (ag). b) d ation, Inc.

the questions, please.

thank you.

Answer 1

(1)

A general equation for a metathesis:

AX + CY → AY + CX

Where,

A and C are cations

X and Y are anions.

For option (d),

2 Na⁺ + CO₃^2- + Cu²⁺ + SO₄^2-   ------> Na₂SO₄ + CuCO₃

Here,

Na⁺ & Cu²⁺ are cations.

CO₃^2- & SO₄^2- are anions.

Therefore, this reaction is metathesis reaction.

(2)

(a) Solubility of given product at 20 ⁰C in 100 mL of water.

Ce(IO₃)₄ = 0.123

RaSO₄ = 2.1 × 10⁻⁴

Pb(NO₃)₂ = 54.3

(NH₄)₂SeO₄ = 115

(b)

RaSO₄ is least soluble in 100 mL of water.

(3)

Addition of HBr will add H⁺ and Br^-,

Ag⁺(aq) + Br^-(aq) --> AgBr(s)

AgBr is likely to precipitate if enough Br^- is added.... therefore this precipitate is AgBr.

Then, after filtration, H₂SO4 addition will form most likely

Ba²⁺(aq) + SO₄^2-(aq) --> BaSO₄(s)

If there is enough SO₄^2- in solution, expect BaSO₄ to form

After Filtration...

NaOH is added, but no precipitate forms

This implies that no Mn²⁺ and Cu²⁺ are present.

Since those should form Mn(OH)₂ and Cu(OH)₂ respectively...

therefore, they are not present

Ions present = Ag⁺, Ba²⁺

(4)

(a) Molecular equation: Fe253(s) + 6 HBr(aq) => 2 FeBr3(aq) + 3 H2S(g) Net ionic equation: Fe253(s) + 6 H+(aq) => 2 Fe3+(aq) + 3 H2S(g) (b) Molecular equation: K2CO3(aq) + Cu(NO3)2(aq) => CuCO3(s) + 2 KNO3(aq) Net ionic equation: CO32- (aq) + Cu2+(aq) => CuCO3(s) (c) Fe(NO3)2(aq) + HCl (aq) => no reaction (d) Molecular equation: Bi(OH)3(s) + 3 HNO3(aq) => Bi(NO3)3(aq) + 3 H2O(1) Net ionic equation: Bi(OH)3(s) + 3 H+(aq) => Bi3+(aq) + 3 H2O(1)