Rates of Reactions (OCR A-Level Chemistry A): Flashcards

Tracking concentration changes at regular intervals

Measuring color intensity changes via light absorbance

Concentration directly proportional to light absorbed

Complementary color to substance being measured

Straight line with negative, constant gradient

Downward curve with decreasing gradient

Time for concentration to decrease to half its value

Constant regardless of starting concentration

$k = \frac{\ln 2}{t_{1/2}}$ or $k = \frac{0.693}{t_{1/2}}$

$\text{s}^{-1}$ or time$^{-1}$