Chemistry A-Level
Significant figures and units in pH calculations
What Significant figures and units in pH calculations means in Chemistry A-Level, as defined for OCR.
Definition of Significant figures and units in pH calculations
Check what you remember
Read the wording for your board, then hide it and explain Significant figures and units in pH calculations in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
pH quoted to two decimal places corresponds to concentration to two significant figures, concentration is in mol dm⁻³ and pH is dimensionless.
Topics that use Significant figures and units in pH calculations
- 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 Significant figures and units in pH calculations in the exam
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