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When you put an alkali and Universal Indicator in a test tube what colour does it go?
Wiki User
∙ 12y ago
blue or purple depending on the pH
Wiki User
∙ 12y ago
When an alkali is added to a test tube containing Universal Indicator, it typically turns the indicator solution a dark green or blue color. This is because Universal Indicator is a mixture of different pH indicators that show a range of colors from red (acidic) to green (neutral) to blue or purple (alkaline). The specific color change observed may vary depending on the concentration and type of alkali used.
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How could you test for an acid or alkali?
Litmus; universal indicator; reaction tests; spectroscopy.
Is alkali soluble in water?
you can find out if a substance is an acid or alkali by adding universal indicator
How don you test for acids and alkis?
You can test for acids and alkalis by two different ways: -Litmus paper reactions -Universal indicator reactions Both ways will allow you to see colour changes and this will tell you if it is an acid or an alkali and what PH it is.
What color does red cabbage indicator change to in alkali?
either a green, dark green or blue colour for i have done the test myself
What is universal indicator state the purpose for which this indicator is used?
Universal Indicator is used to test for the acidity of a solution, because the universal indicator has a wider range of pH that it can explain why a substance is acidic or basic.
How do you test if an alkali is dangerous?
Put in some universal indicator and find the colour. Correspond this to bthe pH scale to find how dangerous it is.
How could you test for an acid or alkali?
Litmus; universal indicator; reaction tests; spectroscopy.
Is alkali soluble in water?
you can find out if a substance is an acid or alkali by adding universal indicator
How don you test for acids and alkis?
You can test for acids and alkalis by two different ways: -Litmus paper reactions -Universal indicator reactions Both ways will allow you to see colour changes and this will tell you if it is an acid or an alkali and what PH it is.
What color does red cabbage indicator change to in alkali?
either a green, dark green or blue colour for i have done the test myself
Why would it be difficult to test a cup of coffee with universal indicator?
Because Coffee is a dark colour and if your testing it with universal indicator paper the paper might stain from the strong coffee colour and not be entirely accurate. I have never tried this personally its just as assumption.
How can you tell if its an acid?
Add an alkali substance to it, such as chalk, if it is an acid it will "fizz" and release carbon dioxide. You could also test with Litmus Paper or Universal indicator.
What is universal indicator state the purpose for which this indicator is used?
Universal Indicator is used to test for the acidity of a solution, because the universal indicator has a wider range of pH that it can explain why a substance is acidic or basic.
How can you identify an acid and an alkali?
You identify acids and alkalis using indicators. Indicators are substances which turns a particular colour for acids and another for bases. E.g. litmus, (acid-red, alkali-green) and phenolphthalein. Indicators have a certain pH value. You can only use a particular indicator of a suitable pH value for a particular acid-base reaction
Why is water used as the universal indicator?
Water is NOT Universal Indicator. Water is often referred to as a Universal Solvent as a large number of substances are soluble in it. Universal Indicator is a chemical agent that can be used to test the pH of a liquid.
How do you test pH of strong acid?
universal indicator
How can you test for an alkaline or acid?
With a universal indicator or with litmus paper.
