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elena-s [515]
3 years ago
6

Which is a spectator ion in the reaction between KOH and CoBr2? CoBr2(aq) Co2+(aq) K+(aq) OH– (aq)?

Chemistry
2 answers:
Oduvanchick [21]3 years ago
8 0
2KOH(aq) + CoBr₂(aq) → 2KBr(aq) + Co(OH)₂(s)

2K⁺ + 2OH⁻ + Co²⁺ + 2Br⁻ → 2K⁺ + 2Br⁻ + Co(OH)₂

K⁺ and Br⁻ are spectator ions
grandymaker [24]3 years ago
4 0

Answer:

K+ and Br-

Explanation:

A spectator ion is an ion which remains in the same form in both the reactants and product side of a chemical reaction i.e. it does not take part in the reaction.

The reaction between KOH and CoBr2 can be represented as:

2KOH (aq) + CoBr2(aq) → 2KBr(aq) + Co(OH)2(s)

In the above equation the three aqueous solutions, KOH, CoBr2 and KBr will ionize into respective ions unlike Co(OH)2 precipitate. The Total ionic equation can be depicted as:

2K+ + 2OH- + Co2+ + 2Br- → 2K+ + 2Br- + Co(OH)2

The K+ and Br- ions remain unchanged and can be cancelled out giving the net ionic equation:

2OH- + Co2+ → Co(OH)2

Thus, K+ and Br- are spectator ions

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6 0
3 years ago
g For the reaction Ag2S(s)⇌2Ag+(aq)+S2−(aq)Ag2S(s)⇌2Ag+(aq)+S2−(aq), Keq=2.4×10−4Keq=2.4×10−4, and the equilibrium concentration
Roman55 [17]

Answer:

0.32 M

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Step 1: Write the balanced reaction at equilibrium

Ag₂S(s) ⇌ 2 Ag⁺(aq) + S²⁻(aq)

Step 2: Calculate the concentration of Ag⁺ at equilibrium

We will use the formula for the concentration equilibrium constant (Keq), which is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species.

Keq = [Ag⁺]² × [S²⁻]

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8 0
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During an experiment, it is observed that iron powder sinks in water and sulfur powder floats in water. What will most likely be
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Sulfur will float, and iron will sink because each will retain its properties.

“Iron will float, and sulfur will sink because each will lose its properties” is <em>incorrect</em>. A substance will lose its properties only if it reacts to form a new substance.

“Both will float because they are physically mixed” is <em>incorrect</em>. The substances in a mixture retain their properties.

“Both will float because they react chemically” is <em>incorrect</em>. Iron and sulfur do not react at room temperature. Even if they did, the iron sulfide would sink.

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mart [117]

Answer:

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Explanation:

The pair that will share electrons when a bond forms between them is Br and Cl.

When electrons are shared between two atoms to form a bond, then the bond type formed is called a covalent bond.

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