What is the % yield if 12g of magnesium is dissolved in hydrochloric acid to produce 20g of magnesium chloride?

First we need to write the balanced equation for the reaction. In this case it is Mg + 2HCl -> MgCl2 + H2. Now we need to work out the maximum theoretical yield of MgCl2 from 12g of Mg. 12g of Mg is 0.5 moles, so a maximum of 0.5 moles of MgCl2 can be created because the reaction ratio is 1:1 as our equation shows. 0.5 moles of MgCl2 weighs 47.5g. Finally we can use the equation % yield = (actual yield / theoretical yield) x 100. In this example, (20 / 47.5) x 100 = 42.1%.

Answered by Holly W. Chemistry tutor

6515 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Describe the structure of metal and its bonding and how its structure contribute to its properties.


Potassium forms an ionic compound with sulfur. Describe what happens when atoms of Potassium react with atoms of sulfur. Give your answer in terms of electron transfer.


How does fractional distillation work?


During fractional distillation, what are we seperating and how are we seperating them?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences