AQA Trilogy GCSE Science - Science

8. Strong & weak acids (HT only)

Mission Objectives

Describe the difference between strong and weak acids in terms of ionisation in aqueous solutions

Explain how acid strength and concentration affect pH and hydrogen ion concentration

Compare concentration and strength in acids

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Keywords

Words and meanings to learn

ionisation

the process by which an acid dissolves in water and releases hydrogen ions (H⁺), determining its strength

dilute

a solution that contains a small amount of solute dissolved in a large volume of solvent

acid

is a substance that releases hydrogen ions (H+) in an aqueous solution

ethanoic acid

scientific name for vinegar

concentrated

a solution that contains a large amount of solute dissolved in a given volume of solvent

This lesson has been written by

Sarah Mintey MBE

Sarah is a former headteacher and charity CEO who founded Developing Experts in October 2015 with the goal to create a fit-for-purpose curriculum for schools. The company has created a science curriculum for children ages 4-16 which is delivered through sequenced lessons mapped against the National Curriculum in biology, chemistry, and physics. Developing Expert's innovative approach to learning has already been road-tested and voted 'best EdTech product in Europe', winning Tech Nation’s Rising Stars earlier in 2019 and a place on Google for Startups Immersion program 2020. In 2022 Developing Experts won the BETT Awards for Best Classroom Resource - Teaching Aid. Sarah is a 'LDC Top 50 Most Ambitious Business Leader' 2022. In October 2022 Developing Experts joined Tech Nation's Upscale 8.0 programme.

Sarah is delighted to be working with over 6500 UK schools and clients such as the Royal Horticulture Society, Network Rail, Rolls Royce, BEIS, National Nuclear Labs, Anglian Water and the Ministry of Defence.

Sarah was awarded an MBE for her services to tech and education in 2020. 

Samantha Batch

Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders. 

Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.

In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!

Required Resources

Magnesium ribbon, hydrochloric acid, ethanoic acid, distilled water, conical flasks, bung and delivery tube, stopwatch, gas syringe and clamp stand.

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