Moles and Volumes (OCR A-Level Chemistry A): Flashcards

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Moles and Volumes
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1 dm³ in cm³

1000 cm³

Concentration (mol dm⁻³) definition

Moles of solute per dm³ of solution

Formula: moles from conc. & vol. (dm³)

n=c×Vn = c \times V

Standard solution

Solution with precisely known concentration

RTP conditions

20°C and 101 kPa

Molar gas volume at RTP

24.0 dm³ mol⁻¹

Formula: gas moles at RTP (dm³)

n=V24.0n = \frac{V}{24.0}

Ideal gas equation

pV=nRTpV = nRT

Value of R (gas constant)

8.314 J mol⁻¹ K⁻¹

Convert °C to K

Add 273

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