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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Concentration Of Solutions (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Concentration Of Solutions' from the broader topic Quantitative Chemistry. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

A burette delivered 23.50 cm3 of 0.100 mol/dm3 Ba(OH)2. How many moles of hydroxide ions (OH–) were provided by that volume? (Ba(OH)2 provides 2 OH– per formula unit.)
When carrying out a titration, the burette reading is recorded as 12.35 cm3 at start and 35.75 cm3 at end. What volume of titrant was delivered?
You dissolve 4.50 g of KNO3 (Mr = 101.1) in water and make up to 250 cm3. What is the concentration in mol/dm3?
A solution contains 35.0 g/dm3 NaCl. Sodium is 39.34% by mass of NaCl. What is the concentration of sodium (g/dm3) in the solution?
Which unit is equivalent to mol/dm3?
In a titration the end-point volumes are 23.90, 23.45, 23.55, 23.55, 23.45 cm3. Why might the student use 23.50 cm3 for calculations instead of a single raw value?
What is the concentration in g/dm3 of a 0.100 mol/dm3 solution of H2SO4 (Mr = 98)?
A sample contains 0.00235 mol of reagent in 25.0 cm3. What is its concentration in mol/dm3?
When converting concentration from mol/dm3 to g/dm3 you must multiply by the Mr. Which of these shows that conversion for a 0.150 mol/dm3 solution of a compound with Mr = 100?
25.0 cm3 of hydrochloric acid is neutralised by 20.0 cm3 of 0.100 mol/dm3 sodium hydroxide. What is the concentration of the hydrochloric acid in mol/dm3? (HCl + NaOH ? NaCl + H2O)
What mass of Na2CO3 (Mr = 106) is needed to prepare 250 cm3 of a 0.200 mol/dm3 solution?