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NeTakaya
3 years ago
15

When cobalt(II) chloride is added to pure water, the Co2+ ions are either hydrated to give a pink color, or combined with chlori

de ion to give a blue color, reaching an equilibrium shown
here: Co(H2O)62+ + 4Cl- ↔ CoCl42- + 6H2O

If the forward reaction is exothermic, which statement below describes the change that the system will undergo if the temperature of the solution decreases.

(A) solution will change color
(B) not enough info is given
(C) solution will turn more pink
(D) solution will turn more blue
Chemistry
1 answer:
Bess [88]3 years ago
4 0

Answer:

(C) solution will turn more pink

Explanation:

An exothermic reaction increases the temperature of the system and an endothermic reaction decreases the temperature.

In an equilibrium, if the forward reaction is exothermic, the reverse reaction is endothermic. Therefore, the decrease of temperature inicates that the reverse reaction is favored.

The reverse reaction in the example produces the hydrated Co²⁺, which gives a pink color to the solution. Therefore, solution will turn more pink.

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Pyridoxine contains 11 hydrogen atoms, 8 carbon atoms, 3 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for pyr
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8 0
3 years ago
1) How much water must be added to 500.mL of 0.200 M HCI to produce a 0.150M solution?
zloy xaker [14]

Answer:

1)

(500.mL)(.200M)/.150M = 667 mL

667mL - 500mL = 167mL of water is needed

2)

1.0 L = 1000mL

M1 V1 = M2 V2

(1.6 mol/L) (175 mL) = (x)(1000mL)

x = .28M

6 0
3 years ago
The smallest part of a molecule is called
yarga [219]

Answer:

D atom

Explanation:

The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms

8 0
2 years ago
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Concentrated HCl is 37% m/m. The density of the solution is 1.19 g/mL. Assume you have 100.0 grams of SOLUTION.
sdas [7]

Answer:

M HCl sln = 12.0785 M

Explanation:

  • molarity (M) [=] mol/L
  • %mm = ((mass compound)/(mass sln))*100

∴ mass sln = 100.0 g

∴ δ sln = 1.19 g/mL

∴ % m/m = 37 %

⇒ 37 % =((mass HCl/mass sln))*100

⇒ 0.37 = mass HCl / 100.0 g

⇒ 37 g = mass HCl

∴ molar mass HCl = 36.46 g/mol

⇒ mol HCl = (37 g)*(mol/36.46 g) = 1.015 mol

⇒ volume sln = (100 g sln)*(mL/1.19 g) =  84.034 mL = 0.084034 L

⇒ M HClsln = 1.015 mol/0.084034 L

⇒ M HCl sln = 12.0785 M

7 0
3 years ago
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