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Most indicators we meet in early science are acid base indicators and conform to this definition. However there are other types of indicator which can show up other types of chemical. For instance we use diphenylamine to show up the end point of the reaction between Fe2+ and potassium dichromate, and lead acetate paper to test for hydrogen sulfide.
What else can I help you with?
Can indicators change colour twice?
Yes.
What is an 'indicator reaction'?
---- indicators are substances which change their colour when treated with acidic or basic solutions this reaction of changing their colour is known as indicator reaction ---- ----
What are the six characteristics of a chemical change?
1. evolution of a gas 2. change in colour of the substance 3. change in temperature of the substance 4. formation of precipitate
Universal indicators of color juices?
Universal indicators of colour juices include whether or not the juice is opaque or clear and the actual color of the juice.
What shows in reaction that chemical change has take place?
Signs that a chemical change has occurred include a color change, formation of a precipitate, evolution of gas (bubbles), or production of heat or light. These observable changes are indicators that new substances have been formed through rearrangement of atoms in the reactants.
Can indicators change colour twice?
Yes.
Why indicator change color?
Indicators are mostly organic aromatic compounds in acidic to basic medium or vice versa the resonating structures of indicators become change which are responsible to change the colour.
What do indicators tell us?
Indicators are used to tell a person whether or not a chemical is present or what pH a substance may be. Usually an indicator is a strip that is dipped into the substance and will change color based on the presence of a substance or pH.
Which of the following is a definite indicator that a chemical change has occured?
Definite indicators of a chemical reaction include exothermic reactions (heat), colour change, bubbles and there might be a few morea new substance forms (study island)
What is the colour with universal indicators ammonia?
Universal indicators typically turn blue or green in the presence of ammonia. This color change indicates a basic or alkaline solution.
What substance in cigarette causes the blood to change colour?
nickateen
What is an 'indicator reaction'?
---- indicators are substances which change their colour when treated with acidic or basic solutions this reaction of changing their colour is known as indicator reaction ---- ----
What are the six characteristics of a chemical change?
1. evolution of a gas 2. change in colour of the substance 3. change in temperature of the substance 4. formation of precipitate
What is another substance will chANGE COLOUR OTHERT THAN RED CABBAGE?
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How do plants like morning glory or hydrangea act as indicators of the soils pH level?
they change colour on reaction to soil pH
Why do indicators change colors?
Indicators change colors to signal a shift in a particular condition or state. This color change helps individuals quickly and easily understand the status or result being conveyed without needing to interpret detailed information.
What are three indicators of a chemical reaction occurring?
there are mainly two ways that indicate that a chemical change has taken place. These ways are the physical properties (the way things look, without changing the chemical makeup of a substance) are different, and the chemical properties (the way the substance reacts with other substances) are different.
