Chemistry A-Level
By-products sulfur dioxide and hydrogen chloride
What By-products sulfur dioxide and hydrogen chloride means in Chemistry A-Level, as defined for OCR.
Definition of By-products sulfur dioxide and hydrogen chloride
Check what you remember
Read the wording for your board, then hide it and explain By-products sulfur dioxide and hydrogen chloride in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
SO₂ and HCl are gaseous by-products that leave the reaction mixture, which helps drive the reaction and gives a purer product.
Topics that use By-products sulfur dioxide and hydrogen chloride
- Carboxylic acids and esters (OCR A-Level)
Related terms
- Acid-catalysed hydrolysis
- Acid–base behaviour of products
- Acyl chlorides as reactive acid derivatives
- Carboxylate salt formation
- Catalysis by concentrated sulfuric acid
- condensation
- Equilibrium position and yield versus rate
- Ester and amide formation
Using By-products sulfur dioxide and hydrogen chloride in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge