nockturnal1993

23.04.2020 • 

Chemistry

Chem molarity help pls! 20 points! ( 3 questions )
1. A 25.0 mL sample of concentrated HCl (12.0 M) is diluted to a final volume of 750.0 mL. Calculate the molarity of the final solution.

2. Calculate the volume (mL) of concentrated HNO3 (15.8 M) that should be used to prepare 250.0 mL of a 0.400 M solution.

3. Calculate the volume of water (in mL) that must be added to 150 mL of 0.600 M HCl solution to give a 0.450 M HCl solution.

Ответ:

adrianna74

15.05.2020

Chemistry

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4.33 L

Explanation:

Assuming ideal behaviour and that all 0.300 moles of gas reacted, we can solve this problem using Avogadro's law, which states that at constant temperature and pressure:

V₁n₂ = V₂n₁

Where in this case:

V₁ = 2.16 Ln₂ = 0.601 molV₂ = ?n₁ = 0.300 mol

We input the given data:

2.16 L * 0.601 mol = V₂ * 0.300 mol

And solve for V₂:

V₂ = 4.33 L

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