thermometric titration
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 temperature and pH against...
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 temperature and pH against...
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 acid added is entered...
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.
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.
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 do this in the...
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 taste sour and its...
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 dies. The production and...
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 patience, collected a glass...
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 data logger and ensure...
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, that I found and...
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 this is to not...
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 use the electrode for...
rogerfrost.com is a compendium of ideas for using technology to find answers to sciencey questions. Since 1995 it has provided ideas to school science teachers. Since 2020 we’ve focussed on questions around the home with a new home automation section. So today we look at ways to measure and monitorĀ around the house.
You will find everything here tagged and indexed by topic or technology.
Roger Frost was a writer from 1988 and this web includes many of his articles for magazines and newspapers. They tell how the early Internet developed; how real scientists work and how real people, like you might use technology at home or school.
Do please add a comment to an article or say hi via the social links. Use this content freely and link back here if you can.
More