Half-life for first-order reactions Student activity Play

Hardness index of water Animation Play

Health effects of dioxins Slideshow Play

Homeostasis and active transport Animation Play

How a catalyst works (2) Whiteboard exercise Play

How a catalyst works (2) Student activity Play

How did the atmosphere form? Student activity Play

How do buffers work? Student activity Play

How do enzymes act? Whiteboard exercise Play

How do enzymes act? Student activity Play

How temperature affects reaction rates Student activity Play

How the concentration of a reactant affects reaction rate Student activity Play

How the concentration of a reactant affects reaction rate Animation Play

How to calculate pH of strong acid solutions? Animation Play

Hydroxide ions concentration calculations Animation Play

Hypotonic; hypertonic and isotonic solutions Animation Play

Increasing the concentrations of reacting substances Animation Play

Influence of some factors on the rate of photosynthesis Student activity Play

Influence of the concentrations of substances on the position of equilibrium Illustration Play

Inhaled and exhaled air Student activity Play

Initial reaction rate Animation Play

Interrelationship of concentrations of hydrogen ions and hydroxide ion Whiteboard exercise Play

Interrelationship of concentrations of hydrogen ions and hydroxide ions Student activity Play

Ionic product of water Kw – summary Animation Play

Is this battery acid any good? Animation Play