Quick questions on Concentration and titration explained: O-Level Chemistry

6short 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 defining concentration?

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Concentration measures how much solute is dissolved in a given volume of solution. There are two units:

What are converting between the two units?

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To convert from moles per cubic decimetre to grams per cubic decimetre, multiply by the relative molecular mass:

What is the three-step titration calculation?

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Every titration calculation follows the same route:

What is q1?

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Calculate the amount, in moles, of solute in

50.0\ \text{cm}^3

of a

0.200\ \text{mol/dm}^3

solution. [2 marks]

What is q2?

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A solution of sodium chloride has a concentration of

0.50\ \text{mol/dm}^3

. Calculate its concentration in g per dm cubed. (Mr of NaCl = 58.5.)

What is q3?

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State the order of the three steps in a titration calculation. [1 mark]

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