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iogann1982 [59]
3 years ago
6

Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydrobromic acid and aqueous potassiu

m sulfide.
Chemistry
2 answers:
anzhelika [568]3 years ago
8 0
<span>K2S(aq)                + 2 HBr(aq)            =      2 KBr                  +   H2S(g)

potassium sulfide + hydrobromic acid = potassium bromide +  hydrogen sulfide

The gas is H2S, hydrogen sulfide
</span>
Andreas93 [3]3 years ago
4 0

Answer:

The chemical equation of the reaction is given as:

2HBr(aq)+K_2S(aq)\rightarrow 2KBr(aq)+H_2S(g)

Explanation:

When aqueous solution of hydrobromic acid combines with aqueous solution of potassium sulfide they give aqueous solution of potassium bromide and hydrogen sulfide gas.

The chemical equation of the reaction is given as:

2HBr(aq)+K_2S(aq)\rightarrow 2KBr(aq)+H_2S(g)

According to reaction, 2 moles of hydrobromic acid reacts with 1 mole of potassium sulfide to form 2 moles of potassium iodide and 1 mole of hydrogen sulfide gas.

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In an experiment, you measure a solution absorbance of 0.2 with a path length of 1cm. If the molar absorptivity coefficient is 5
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A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.

<h3>What does Beer-Lambert law state?</h3>

The Beer-Lambert law states that for a given material sample, path length and concentration of the sample are directly proportional to the absorbance of the light.

A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, we can calculate the molarity of the solution using the following expression.

A = ε × b × c

c = A / ε × b

c = 0.2 / (59 cm⁻¹ M⁻¹) × 1 cm = 0.003 M

where,

  • A is the absorbance.
  • ε is the path length.
  • b is the molar absorptivity coefficient.
  • c is the molar concentration.

A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.

Learn more about the Beer-Lambert law here: brainly.com/question/12975133

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<h2>Answer:</h2>

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