Question

Types of Chemical Reactions

1.Aqueous solutions of barium chloride and silver nitrate are combined. The balanced equation for the reaction that occurs contains which of the following terms?
a.)AgCl (aq)
b.)2 AgCl (s)
c.)2 Ba(NO3)2 (aq)
d.)BaNO3 (s)

2.)Sodium metal is added to water. Which of the following would be observed in the lab?
a.)A basic solution and bubbles of hydrogen gas.
b.)A neutral solution and bubbles of hydrogen gas.
c.)An acidic solution and bubbles of hydrogen gas.
d.)A basic solution and bubbles of oxygen gas.

3.)When sodium chloride and lead (II) nitrate react in an aqueous solution, a yellow precipitate is formed. What is the identity of the precipitate?
a.)NaCl
b.)Pb(NO3)2
c.)PbCl2
d.)NaNO3

4.Which of the following metals could not be used to form solid copper from a solution of copper (II) chloride?
a.)Iron
b.)Platinum
c.)Aluminum
d.)Magnesium

5.Which of the following would not result in a chemical reaction?
a.sodium hydroxide + iron (III) chloride
b.silver nitrate + potassium chloride
c. copper (II) oxide + sodium hydroxide
d. barium nitrate + copper (II) sulfate

6.A piece of copper wire is added to a solution of silver (I) nitrate. Which of the following is the correct balanced equation for this reaction? Copper forms +2 ions.
a.)Cu (s) + 2 AgNO3 (aq) → 2 Ag (s) + Cu(NO3)2 (aq)
b)Cu (s) + AgNO3 (aq) → Ag (s) + CuNO3 (aq)
c.)2 Cu (s) + 2 AgNO3 (aq) → 2 Ag (aq) + 2 Cu(NO3)2 (s)
d.)3 Cu (s) + 2 Ag3N (aq) → 6 Ag (s) + Cu3N2 (aq)

7.What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?
a.)No reaction will occur between bromine and sodium iodide
b.)Br2 + 2 NaI → 2 NaBr + I2
c.)2 Br + NaI2 → NaBr2 + 2 I
d.)Br + NaI → NaBr + I

8.Which of the following is most likely to be an endothermic reaction?
a.)decomposition
b.)combustion
c.)synthesis
d.)single replacement

9.Which of the following observations would be true of the chemical reaction below? Check all that apply. CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
a.)A precipitate would be formed
b.)The original calcium carbonate solid should become noticeably smaller
c.)Bubbles of a gas would be produced. The gas should extinguish a glowing wood splint.
d.)Bubbles of a gas would be produced. The gas should ignite a glowing wood splint.
e.)The final solution should be a base

Answer 1

Step-by-step explanation:

1 -

Ba(OH)2 + 2 AgNO3 --> 2AgCl(s) + Ba2+ + NO3-

So letter b

2-

2 Na(s) + 2 H2O --> 2 NaOH + H2

So letter a

3-

2 NaCl + Pb(NO3)2 --> 2 NaNO3 + PbCl2(s)

So letter c

4-

CuCl2 + Pt(s) --> X

Platinum is a metal noble thant copper, so it won't form solid copper.

so letter b

5 -

C, copper oxide is not soluble in water.

6-

Cu (s) + 2 AgNO3 --> Cu(NO3)2 + 2 Ag(s)

So letter a. it form 2 Ag(s) moles so the nox number is the same on the reagents and the products.

7-

Br2 + 2 NaI --> 2NaBr + I2

The halogens will always be in the dimer form.

8-

C - Synthesis, the endothermic reaction is a reaction that need energy to occurs.

9-

a) All of the products are soluble on water.

b)Yes, it will happen because it is reacting.

C)Yes, it will liberate CO2 that is good to extinguish.

D) NO, to ignite a glowing wood, it should be O2

E) No, the final solution should be neutral, if the amount of the reagents are the same.

Answer 2

1.Aqueous solutions of barium chloride and silver nitrate are combined. The balanced equation for the reaction that occurs contains which of the following terms?

b.)2 AgCl (s)


2.)Sodium metal is added to water. Which of the following would be observed in the lab?
a.)A basic solution and bubbles of hydrogen gas.


3.)When sodium chloride and lead (II) nitrate react in an aqueous solution, a yellow precipitate is formed. What is the identity of the precipitate?

c.)PbCl2

4.Which of the following metals could not be used to form solid copper from a solution of copper (II) chloride?

b.)Platinum


5.Which of the following would not result in a chemical reaction?

d. barium nitrate + copper (II) sulfate

6.A piece of copper wire is added to a solution of silver (I) nitrate. Which of the following is the correct balanced equation for this reaction? Copper forms +2 ions.
a.)Cu (s) + 2 AgNO3 (aq) → 2 Ag (s) + Cu(NO3)2 (aq)


7.What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?
a.)No reaction will occur between bromine and sodium iodide


8.Which of the following is most likely to be an endothermic reaction?

b.)combustion


9.Which of the following observations would be true of the chemical reaction below? Check all that apply. CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)

d.)Bubbles of a gas would be produced. The gas should ignite a glowing wood splint.