Chemistry A-Level
Two-way conversion
What Two-way conversion means in Chemistry A-Level, as defined for OCR.
Definition of Two-way conversion
Check what you remember
Read the wording for your board, then hide it and explain Two-way conversion in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Converting between pH and [H⁺(aq)] works in both directions, keeping concentrations in mol dm⁻³ and quoting pH to two decimal places.
Topics that use Two-way conversion
- Acids, bases and buffers (OCR A-Level)
Related terms
- Acid dissociation constant Ka
- acidic buffer
- Amphiprotic
- basic buffer
- Basicity
- Buffer action against added acid and alkali
- Buffer action and pH resistance
- Calibration with buffer solutions
Using Two-way conversion 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.
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