§-Quick questions
TASChemistryUnit 3: Equilibrium, Acids and Redox
Quick questions on Gas laws and molar volume: TCE Chemistry (Tasmania)
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the combined gas law?Show answer
When a fixed amount of gas changes conditions, the moles cancel and you get the combined gas law:
What are mixtures of gases?Show answer
In a mixture, each gas exerts its own partial pressure as if it alone occupied the container, and the total pressure is the sum of the partial pressures (Dalton's law). When a gas is collected over water, the measured pressure includes the saturated water vapour pressure, so subtract the vapour pressure to find the partial pressure of the dry gas before using . This correction is a common feature of gas-collection experiments.
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