thermometric titration
visitors this year: 420 Thermometric titration As acid reacts with alkali the pH changes and heat is evolved. This heat of neutralisation can be easily monitored using sensors – to produce a graph of...
Tagged: pH sensor
acid-base titration
visitors this year: 112 Acid-base titration As acid drains into alkali the pH changes. This can be monitored using a pH sensor to instantly produce a graph of pH against volume. The volume of...
respiration; germination; fermentation; anaerobic & aerobic
When living things respire they use up oxygen. This can be monitored using an oxygen sensor. The living thing can be a plant, animal or microorganism. Maggots, locusts, or yeast are often used and so can pond-weed. If you use Elodea, its container should be kept in the dark or wrapped in foil.
It is also quite easy to show how temperature affects the rate of respiration
– however, in this example, the oxygen sensor should be able to compensate for its own response to temperature changes.
photosynthesis – measure oxygen or pH
Sensors can be used to monitor photosynthesis. They can show that as the light level increases, the oxygen level will also increase. It is also possible to show the effect of carbon dioxide levels (as added hydrogen carbonate solution) and to show the effect of coloured light.
lipase and milk fat
visitors this year: 1,009 Fats, such as the fats in milk, need to be digested by your body. They are broken down into fatty acids and glycerol by an enzyme called lipase. You can...
fermentation
visitors this year: 166 In the manufacture of yoghurt, bacteria turn lactose into lactic acid. The acid denatures or spoils the milk protein and sets it solid. In the process, the milk starts to...
changes in an aquarium
visitors this year: 253 Life in any aquatic habitat has to be supported by oxygen. We are all too familiar with rivers and streams where the oxygen supply has been exhausted and the river...
pH data on souring milk
visitors this year: 148 The label on my milk bottle tells me how long the milk will ‘last’ at different temperatures. What do they measure to make this assessment? Is it the pH? I summoned...
measure lipase enzyme activity
visitors this year: 404 If you’ve a couple of pH electrodes and sensors, the following is one of the most successful enzyme measurements I’ve tried. Before bothering further, connect the pH electrodes to a...
how to store a pH probe
visitors this year: 134 I read somewhere that pH probes do not last forever and that may be so. It was certainly true for the draw full of pH probes, all left to dry,...
acid-base titration
visitors this year: 276 As acid drains into alkali the pH changes. This can be monitored using a pH sensor to produce an instant graph of pH against volume. The easy way of doing...
oxygen and pH sensors
visitors this year: 110 oxygen sensor Sensor is used in conjunction with an oxygen electrode. Good for demonstrations where you monitor photosynthesis, fermentation or where you re-breathe the air in plastic bag. Before you...
