Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

% Yield watch

Announcements
    • Thread Starter
    Offline

    0
    ReputationRep:
    When you are preparing aspirin why might the yield be lower than predicted and why might the yield be higher than predicted ? Also, why does the mass of aspirin increase after recrystallisation ?

    I really need help to answer these questions for my lab report ...
    •  Official Rep
    Offline

    15
    ReputationRep:
     Official Rep
    Sorry you've not had any responses about this.

    Why not try posting in a specific subject forum- you might have more luck there.

    Here's a link to our subject forum which should help get you more responses.

    Offline

    2
    Could be:

    Impure reactants/exothermic and thus high energy will be wasted/reversible reaction.

    Yield may be higher: reactants have fully decomposed, more energy released? Sorry Im so bad I know
 
 
 
Poll
Do I go to The Streets tomorrow night?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.