10th grade Theoretical and percent yield worksheet

Theoretical and percent yield

Grade 10 Science Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   A lab mixes 16.8 g of baking soda (84.01 g/mol) with vinegar and collects 7.7 g of CO₂ (44.01 g/mol), 1 : 1. What is the percent yield, to 0.1%, Esme?
2. 2.

   A lab mixes 8.4 g of baking soda (84.01 g/mol) with vinegar and collects 3.96 g of CO₂ (44.01 g/mol), 1 : 1. What is the percent yield, to 0.1%, Jun?
3. 3.

   A lab mixes 33.6 g of baking soda (84.01 g/mol) with vinegar and collects 14.96 g of CO₂ (44.01 g/mol), 1 : 1. What is the percent yield, to 0.1%, Kira?
4. 4.

   Zee says a 120% yield means the class did better than perfect. Which reply fits, Luz?

   • Agree: a higher yield is a better yield
   • Disagree: over 100% points to a wet or impure product
   • Agree: careful work can beat the theoretical yield
5. 5.

   Pia says percent yield is theoretical ÷ actual × 100. Which reply fits, Noah?

   • Agree: the larger number goes on top
   • Disagree: it is actual ÷ theoretical × 100
   • Agree: either order gives the same percent
6. 6.

   A plant takes in 264.06 g of CO₂ (6 mol). Photosynthesis makes 1 mol of glucose (180.18 g) per 6 mol of CO₂. What is the theoretical yield of glucose, Pia?

   • 1081.08 g, from 6 mol of glucose
   • 264.06 g, the same mass as the CO₂
   • 180.18 g, from 1 mol of glucose
7. 7.

   That plant stores 162.16 g of glucose against the 180.18 g expected. What is the percent yield, Ren?

   • 15%, from 162.16 ÷ 1081.08 × 100
   • 90%, from 162.16 ÷ 180.18 × 100
   • 111.1%, from 180.18 ÷ 162.16 × 100
8. 8.

   Group A makes 4.18 g of an expected 4.40 g; Group B makes 8.36 g of an expected 8.80 g. Which has the higher percent yield, Zee?

   • Neither: both are 95%
   • Group A, since its sample was smaller
   • Group B, since it made more grams
9. 9.

   Group A gets 90% and Group B 70% from the same reaction. Which lost more of its product, Ari?

   • Group B, with 30% missing
   • Group A, since its number is bigger
   • Neither, since both are under 100%
10. 10.

    Group A reports 98% from damp crystals; Group B reports 91% from dry ones. Which result is more trustworthy, Bo?

    • Group A's, since its yield is higher
    • Group B's, since its crystals are dry
    • Neither, since both are under 100%