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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

Which indicator is commonly suitable for a titration between a strong acid and a strong base?
When performing a titration, why is it good practice to take the mean of concordant titre results rather than include an outlying anomalous titre?
A student titrates 25.0 cm3 of Na2CO3 solution with 30.0 cm3 of 0.100 mol/dm3 HCl using 2NaOH? (Note: correct reaction is Na2CO3 + 2HCl ? 2NaCl + CO2 + H2O). How many moles of HCl were used?
How many cm3 of final solution are needed to dilute 50.0 cm3 of 0.500 mol/dm3 solution to 0.100 mol/dm3?
What is the concentration in g/dm3 of a 0.100 mol/dm3 solution of H2SO4 (Mr = 98)?
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?
A student titrates 25.00 cm3 of HCl with 23.50 cm3 of 0.100 mol/dm3 Ba(OH)2. Using 2HCl + Ba(OH)2 ? BaCl2 + 2H2O, what is the concentration of HCl (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?
What mass in grams of solute would give a 0.500 mol/dm3 solution if dissolved to make 250 cm3, for a substance with Mr = 120?
A diluted sample has concentration 0.0250 mol/dm3. If the dilution factor from stock to sample was 1 in 20, what was the stock concentration?
A sample contains 0.00235 mol of reagent in 25.0 cm3. What is its concentration in mol/dm3?