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
Answers: 2
Chemistry, 22.06.2019 18:00, kyllow5644
Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 3
Chemistry, 22.06.2019 20:00, denaemarie02
Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)
Answers: 2
Chemistry, 22.06.2019 23:00, soccerplayer17
What is the number of neutrons in an atom with atomic mass of 35
Answers: 2
Types of chemical reactions
1.aqueous solutions of barium chloride and silver nitrate are com...
1.aqueous solutions of barium chloride and silver nitrate are com...
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