Percentage Yield (chemistry Only) (GCSE Chemistry)

Which laboratory technique helps improve percentage yield by preventing product loss during transfer?

Theoretical yield of a product is 12.4 g and the actual mass obtained is 9.3 g. What is the percentage yield (to the nearest whole %)?

A student obtains very different yields in four repeats (random scatter). Which best practice reduces random error and gives a better percentage yield estimate?

When calculating percentage yield using masses, why must you convert masses to moles if reaction equation involves mole ratios?

If the theoretical mole yield of product is 0.500 mol and the actual mole yield is 0.420 mol, what is the percentage yield?

Theoretical yield = 0.375 mol, molar mass product = 88.0 g/mol, actual mass obtained = 27.5 g. What is percentage yield?

In a reaction the maximum theoretical mass of product is 2.50 g and the percentage yield is 40.0%. What is the actual mass obtained?

Which of these reasons explains a low percentage yield (e.g., 45%)?

Hydrogen + chlorine ? hydrogen chloride. Theoretical yield of HCl = 36.5 g; actual yield = 29.2 g. What is percentage yield (to 3 s.f.)?

A reaction gives a percentage yield greater than 100%. Which is the most likely reason?

A student carried out a titration to produce a precipitate, filtered it and weighed wet filter plus precipitate, then calculated yield. This gave a percentage yield of 110%. Best immediate correction?