Download presentation

Presentation is loading. Please wait.

Published byMauricio Pilgram Modified over 3 years ago

1
HIGHER GRADE CHEMISTRY CALCULATIONS Calculation of percentage yield. Percentage yield is calculated using the formula:- percentage yield = x 100 The actual yield is given in the question. The theoretical yield is calculated from the balanced equation. actual yield theoretical yield Worked example. In a reaction 320 kg of sulphur dioxide reacted with oxygen to form 360kg of sulphur trioxide. Calculate the percentage yield. Find the theoretical yield using the balanced equation:- 2SO 2 + O 2 2SO 3 2 mol 2 mol 128.2 g 160.2 g 128.2 kg 160.2 kg 320 kg 399.9 kg percentage yield = x 100 = 90.0% 360 399.9

2
Higher Grade Chemistry Calculation of percentage yield. Calculations for you to try. 1.0.5 tonnes of hydrogen reacts with excess nitrogen to form 0.66 tonnes of ammonia. N 2 + 3H 2 2NH 3 Calculate the percentage yield of ammonia. N 2 + 3H 2 2NH 3 3 mol 2 mol 6 g 34 g 6 tonnes 34 tonnes 0.5 tonnes 2.83 tonnes percentage yield = x 100 = 23.32% 0.66 2.83

3
Higher Grade Chemistry Calculation of percentage yield. Calculations for you to try. 2. Ethene reacts with steam to ethanol C 2 H 4 + H 2 O C 2 H 5 OH Calculate the percentage yield of ethanol when 140g of ethene reacts to form 170 g of ethanol. C 2 H 4 + H 2 O C 2 H 5 OH 1 mol 1 mol 28 g 46 g 140 g 140 / 28 x 46 g 230 g percentage yield = x 100 = 73.9% 170 230

Similar presentations

OK

Mass-Mass Conversions 56.0 g N 2 x g N 2 g NH 3 28.0 1 1 2 = 1904 = 68.0 1. When nitrogen and hydrogen react, they form ammonia gas, which has the formula.

Mass-Mass Conversions 56.0 g N 2 x g N 2 g NH 3 28.0 1 1 2 = 1904 = 68.0 1. When nitrogen and hydrogen react, they form ammonia gas, which has the formula.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Field emission display ppt on tv Ppt on polynomials download youtube Ppt on flexible exchange rate Ppt on maths for class 10 on statistics Ppt on law against child marriage bangladesh Ppt on synthesis and degradation of purines and pyrimidines are components Microsoft office ppt online reader Ppt on collection framework in java Ppt on review writing software Ppt on 3g mobile technology download