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What are indicators of a chemical change when 2 substances are mixed together?
Some indicators include:Change in TemperatureChange in ColorNoticeable Odor (after reaction has begun)Formation of a PrecipitateFormation of BubblesWhen two or more reactants are mixed and a change in temperature, color, etc. is noticed, a chemical reaction is probably occurring. These are not definite indicators; a chemical reaction may not be occurring. A change in color is not always a chemical change. If one were to change the color of a substance in a non-chemical reaction scenario, such as painting a car, the change is physical and not chemical. This is because the composition of the car has not changed. Proceed with caution.
What characteristics limit the usefulness of indicators?
Chemical indicators measure the pH directly Chemical indicators are highly expensive They must be chosen for a specific pH range Chemical indicators cannot determine the exact value of pH of the solution
Are indicators acidic or basic in nature?
Indicators can be both acidic and basic in nature, depending on their color change properties in response to different pH levels. Some indicators change color in acidic solutions, while others change color in basic solutions.
What indicators definitely show that a chemical reaction has taken place?
Some indicators that show a chemical reaction has taken place include the formation of a gas, a color change, the production of heat or light, or the formation of a precipitate (a solid formed from two liquids mixing together).
How indicators can tell the difference between acid and a base?
Indicators can differentiate between acids and bases based on their chemical properties. Indicators change color depending on the pH of the solution they are added to. For example, acids will turn indicators like litmus paper red, while bases turn them blue. This color change occurs because indicators respond to changes in hydrogen ion (H+) concentration in the solution.
Why do you need indicators of chemical change?
Indicators of chemical change are needed to detect when a chemical reaction has occurred. They can provide visual cues, such as color changes or gas production, that indicate a chemical transformation has taken place. These indicators help scientists and chemists monitor and understand the progress of reactions.
True or false - is it possible to make indicators out of vegetables?
Yes, you can. They are not as good as the chemical indicators, but they can indicate a basic acid/alkali difference.
What chemical an you use to test acids and alkali's?
These substances are called pH indicators.
What vegetables or fruits make good chemical indicators?
tomato's red cabbage
What colors do chemical indicators turn and what do the colors mean?
With PH indicators, showing acidity and alkalinity, green is neutral, blue-purple is alkaline, yellow-red is acid.
What has the author O Tomi cek written?
O. Tomi cek has written: 'Chemical indicators'
What is the chemical compound of pH indicator?
Many indicators are known today; see the link below.
What are indicators of a chemical change when 2 substances are mixed together?
Some indicators include:Change in TemperatureChange in ColorNoticeable Odor (after reaction has begun)Formation of a PrecipitateFormation of BubblesWhen two or more reactants are mixed and a change in temperature, color, etc. is noticed, a chemical reaction is probably occurring. These are not definite indicators; a chemical reaction may not be occurring. A change in color is not always a chemical change. If one were to change the color of a substance in a non-chemical reaction scenario, such as painting a car, the change is physical and not chemical. This is because the composition of the car has not changed. Proceed with caution.
When something is blue is that a physical or chemical change?
indicators of a chemical reacton include color change, heat given off, and gas produced. indicators of a physical change are phase changes, changes in shape, and changes in size. "Being blue" is not a change at all. It's a condition.
What characteristics limit the usefulness of indicators?
Chemical indicators measure the pH directly Chemical indicators are highly expensive They must be chosen for a specific pH range Chemical indicators cannot determine the exact value of pH of the solution
What is the chemical used to identify changes in pH?
The chemical commonly used to identify changes in pH is an indicator, such as litmus paper or phenolphthalein. These indicators change color in response to changes in the acidity or alkalinity of a solution, allowing for easy visual detection of pH changes.
Which chemicals would be the best indicator that the unknow?
To identify an unknown substance, the best chemical indicators typically include pH indicators, which can reveal acidity or alkalinity, and colorimetric indicators that change color in the presence of specific ions or compounds. For instance, litmus paper can indicate pH levels, while reagents like phenolphthalein or bromothymol blue can provide additional insights into the chemical nature of the substance. Additionally, specific tests for ions, such as silver nitrate for chloride or barium chloride for sulfate, can help identify particular anions. Ultimately, a combination of these indicators will yield the most comprehensive understanding of the unknown chemical.
