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What name is given to a substance which changes colour in acids and alkali's?
A substance that changes color in acids and alkalis is called an indicator. These are often used in laboratory settings to determine the pH of a solution based on the color change it undergoes when exposed to different levels of acidity or alkalinity.
When something changes colour when mixed with water is it a physical or chemical property?
If something changes color when mixed with water, it is typically a physical property. It could be due to interactions between the substance and water molecules, but the chemical composition of the substance remains the same.
What evidence do you have that a chemical reaction took place?
Evidence of a chemical reaction includes the formation of a new substance with different properties, changes in color, the release of gas or heat, or the formation of a precipitate. Additionally, changes in mass due to the rearrangement of atoms in the reactants can also indicate a chemical reaction has occurred.
What is the correct colour for iodine gas?
Purple !! :) x
How a chemical reaction may determine if a new substance has been formed?
The formation of a new substance can be confirmed by the formation of a precipitate or by changes in colour / smell / texture or by the evolution of gas. Chromatographic techniques can also be used to identify the formation of the new product.
Which substance changes the colour of pH paper into greenish?
This depends on the kind of pH paper.
What is an indicator as related to an acid and a base?
It is a substance(chemical or natural) which changes colour in the presence of an acid or base.
What is special about universal indicator?
It changes colour depending on the pH of the substance put on it. It is a quick and easy way of identifying the pH of a substance, however it is not 100% accurate.
What is physically happening when water is dissolving a substance?
when we dissolve a substance then first of all there may occur physical change like shape,colour,temperature etc. these changes are called physical changes.
What are the five signs of a physical reaction?
colour change gas bubbles new substance formed texture changes something else i don't know about.
What treatment makes a white diamond partially purple on the inside?
Diamond treatments to change colour are irradiation. Depending on the original, natural colour of the stone, irradiation will enhance whatever exists in the stone. The process does not add or subtract any physical substance, it simply changes the existing substance.
What is an acid and base?
An acid base indicator is a substance that changes colour due the PH of the medium in which it is dissolved.
How can anhydrous salt changes into their hydrated salt?
On heating, hydrated salts lose their water of crystallization and as a result, the crystals lose their shape and colour and change to a powdery substance.
What substance gives plants there colour?
Chlorophyll
What substance is yellow-brown in colour?
Iodine
What name is given to a substance which changes colour in acids and alkali's?
A substance that changes color in acids and alkalis is called an indicator. These are often used in laboratory settings to determine the pH of a solution based on the color change it undergoes when exposed to different levels of acidity or alkalinity.
Why does hair turn grey or white?
because the older you get the colour changes. it is the same for some children as their hair colour changes.
