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elena-s [515]
2 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]2 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]2 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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Balance this equation. If a coefficient of "1" is required, choose "blank" for that box. C2H6 + O2 → CO2 + H2O
fenix001 [56]
Step 1: Write the unbalanced equation,

                                 C₂H₆  +  O₂    →    CO₂  +  H₂<span>O

There are 2 C at left hand side and 1 carbon at right hand side. So, multiply CO</span>₂ by 2 to balance C atoms at both side. So,

                                 C₂H₆  +  O₂    →   2 CO₂  +  H₂O

Now, count number of H atoms at both sides. There are 6 H atoms at left hand side and 2 at right hand side. Multiply H₂O by 3 to balance H atoms.


                                 C₂H₆  +  O₂    →   2 CO₂  +  3 H₂O

At last, balance O atoms. There are 2 O atoms at left hand side and 3 O atoms at right hand side. Multiply O₂ with 1.5 (i.e. 3/2) to balance O atoms. i.e.

                                 C₂H₆  +  3/2 O₂    →   2 CO₂  +  3 H₂O

Hence, the equation is balanced. If you want to make equation fraction free then multiply all equation with 2. i.e.

                           ( C₂H₆  +  3/2 O₂    →   2 CO₂  +  3 H₂O ) × 2

                                2 C₂H₆  +  3 O₂    →   4 CO₂  +  6 H₂O
5 0
3 years ago
Read 2 more answers
For test 6 (150 hevy 50 light particles), what is the pressure contribution from the heavy particles?
lawyer [7]

Answer:

The pressure contribution from the heavy particles is 17.5 atm

Explanation:

According to Dalton's law of partial pressures, if there is a mixture of gases which do not react chemically together, then the total pressure exerted by the mixture is the sum of the partial pressures of the individual gases that make up the mixture.

In the simulation:

the pressure of the 50 light particles alone was determined to be 5.9 atm, the pressure of the 150 heavy particles alone was measured to be 17.5 atm,

the total pressure of the mixture of 150 heavy and 50 light particles was measured to be 23.4 atm

Total pressure = partial pressure of Heavy particles + partial pressure of light particles

23.4 atm = partial pressure of Heavy particles + 5.9 atm

Partial pressure of Heavy particles = (23.4 - 5.9) atm

Partial pressure of Heavy particles = 17.5 atm

Therefore, the pressure contribution from the heavy particles is 17.5 atm

4 0
2 years ago
Ca(OH)2 + 2 H2SO4 → CaSO4 + 2 H2O
Pie

Answer:

hope this helped

Calcium Hydroxide + Sulfuric Acid = Calcium Sulfate + Water

Explanation:

6 0
2 years ago
Read 2 more answers
Calculate the density of an aluminum block with a volume of 100 cm3 and a mass of 270g.
m_a_m_a [10]

Answer:

<h2>2.7 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{270}{100}  =  \frac{27}{10} \\

We have the final answer as

<h3>2.7 g/cm³</h3>

Hope this helps you

6 0
2 years ago
How’s it possible for liquid to boil at 25 C?
Lera25 [3.4K]

Answer:

Well, not always. It depends on where you're doing the boiling. In fact, water will boil at about 202 degrees in Denver, due to the lower air pressure at such high elevations

Explanation:

4 0
3 years ago
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