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Zina [86]
1 year ago
6

2. What is the concentration of hydrochloric acid?

Chemistry
1 answer:
nika2105 [10]1 year ago
3 0
<h2><em><u>Answer</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em></h2><h3><em><u>Hydrochloric</u></em><em><u> </u></em><em><u>acid</u></em><em><u> </u></em><em><u>(</u></em><em><u>HCI</u></em><em><u>)</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>supplied</u></em><em><u> </u></em><em><u>commerically</u></em><em><u> </u></em><em><u>at</u></em><em><u> </u></em><em><u>concentrations</u></em><em><u> </u></em><em><u>mainly</u></em><em><u> </u></em><em><u>within</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>range</u></em><em><u> </u></em><em><u>2</u></em><em><u>8</u></em><em><u>-</u></em><em><u>3</u></em><em><u>6</u></em><em><u>%</u></em><em><u> </u></em><em><u>w</u></em><em><u>/</u></em><em><u>w</u></em><em><u>.</u></em></h3>

<h2><em><u>Please</u></em><em><u> </u></em><em><u>mark</u></em><em><u> </u></em><em><u>may</u></em><em><u> </u></em><em><u>be</u></em><em><u> </u></em><em><u>brainliest</u></em><em><u> </u></em><em><u>answer</u></em><em><u>.</u></em><em><u> </u></em></h2>

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What is the pH of a 0.300 M NH₃ solution that has Kb = 1.8 × 10⁻⁵ ? The equation for the dissociation of NH₃ is: NH₃ (aq) + H₂O
nalin [4]

Answer:

11.4

Explanation:

Step 1: Given data

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Step 2: Write the dissociation equation

NH₃(aq) + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq)

Step 3: Calculate the concentration of OH⁻

We will use the following expression.

[OH^{-} ]=\sqrt{Kb \times Cb } = \sqrt{1.8  \times 10^{-5} \times 0.300 } = 2.3 \times 10^{-3} M

Step 4: Calculate the pOH

We will use the following expression.

pOH =-log[OH^{-} ]= -log(2.3 \times 10^{-3} M) = 2.6

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We will use the following expression.

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8 0
3 years ago
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