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Many soluble dyes change their color with changes in pH (a measure of the concentration of acid in a solution). Such dyes may be used to indicate when the acid (base) in a solution has been neutralized by addition of an equal amount of base (acid). Each indicator dye has a particular range of pH for which it is useful. pH test strips and papers often incorporate two or more dyes to extend the range of pH over which they can be used. The best indicator dyes are strongly colored (so that only small amounts are needed), undergo an easily seen change with pH (either from one color to another, or from clear to colored), are nontoxic, and are chemically stable.
Wiki User
∙ 12y ago
Wiki User
∙ 12y ago- When an universal indicator solution is added to the alkali it turns to BLUE.
- pH value of alkali is 10 and 11.
Wiki User
∙ 6y agoThe color is violet to indigo.
Wiki User
∙ 10y agoViolet dark
Wiki User
∙ 11y agoblue
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What turns universal indicator blue?
A base turns the universal indicator blue or u can say a alkali substance.
What is the material used to remove an indicator from a neutralized solution how does this work?
it is universal indicator with mixture of alkali
What color does universal indicator turn in deionized water?
since water is pretty neutral, the water does not change color but the universal indicator does. The universal indicator changes color as per the quantity of deionized water... But it changes to straw color or pale yellow in 50mL of deionized water.
What color does borax turn in Universal indicator?
Blue
What pH colour is a neutral?
The color is green for the universal indicator.
What color did universal indicator if it is added to weak alkali?
blue
What color would universal indicator in strong alkali?
red
What color is the color of universal indicator?
they have so many colours because they show if it is an acid or an alkali
What effect does and alkali have on an universal indicator?
It turns the universal indicator purple or blue.
When you put an alkali and Universal Indicator in a test tube what colour does it go?
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.
Universal indicator is a solution that changes what in an acidic or alkali solution?
Universal indicator doesn't change anything in an acidic or alkali solution. All universal indicator does is show how acidic or alkaline a solution is (red being acidic, green being neutral and blue being alkali)
What turns universal indicator blue?
A base turns the universal indicator blue or u can say a alkali substance.
What is the material used to remove an indicator from a neutralized solution how does this work?
it is universal indicator with mixture of alkali
Do alkalis make a universal indicator turn green?
The alkali makes a universal indicator turn blue.
Would universal indicator turn purple in a strong alkali?
no i think
What colour will universal indicator turn when acid is mixed with alkali?
It will turn green! :)
What colour will universal indicator turn when mixed with a strong alkali?
Purple
