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An indicator does not need to indicate for only one substance. Depending on the field, sometimes it does and sometimes it does not. If it is a drug test where an artificial drug is similar to a natural substance, then an indicator should test for just the illegal substance. In a mine, a number of valuable chemicals are found together. In that case a broad test can be used. You do not care if the chemical reaction shows if any of the desired chemicals are present. If the test is positive, you want to mine the ore. If it is negative, you will save your money.
What else can I help you with?
Which chemical is the best indicator that the substance is a plant?
Cellulose cell wall is the best indicator of plant based substance.
An indicator does which one of the following in the presence of acids and bases?
An indicator is a substance that changes color in response to changes in acidity or alkalinity (pH). In the presence of acids, indicators change color to indicate acidity, and in the presence of bases, they change color to indicate alkalinity. This color change helps to visually determine the pH of a solution.
What result do you get with paper chromatography to indicate a pure substance?
only contain one colour
Why is universal indicator often more useful than litmus indicator?
Universal indicator can show a wider range of pH levels compared to litmus indicator, which can only indicate acidic or basic solutions. Universal indicator provides a full spectrum of colors corresponding to different pH values, making it more precise and versatile for measuring pH levels in various solutions.
What is the only definite indicator that a reaction has taken place?
The only definite indicator that a reaction has taken place is the formation of a new substance with different chemical properties from the starting materials. This can be observed through changes in color, temperature, formation of a precipitate, or evolution of gas.
How does a chemical indicator work?
A chemical indicator works by changing color in response to a change in the chemical environment, such as a change in pH. This color change provides a visual clue about the presence or absence of a particular substance or a specific condition. Chemical indicators are often used in laboratory experiments to monitor reactions or in various applications such as pH testing.
Why does cabbage juice work as an indicator?
put small pieces of purple cabbage in hot water and stir it and leave it for 20 min and take only water. if indicator turns substance red it is acidic ,if blue then basic if no change then neutral
Why is the universal indicator more useful than the red cabbage?
The universal indicator is better than the red cabbage indicator because the universal indicator has a wider range of pH that it can explain why a substance is acidic or basic. The red cabbage indicator only tests the substance if it is an acid or a base. Also, the universal indicators are made carefully and it is manufactured in a precise manner so the results are very reliable. Red cabbage indicators will vary in concentration which could cause errors to occur in determining the pH of a substance.
Can you explain the use of either "and" or "or" in this context?
In this context, "and" is used to indicate that both conditions must be met, while "or" is used to indicate that only one of the conditions needs to be met.
What is universal indicator very short answer only?
A universal indicator is a pH indicator that exhibits a gradual change in color to indicate the acidity or alkalinity of a solution. It can show a range of pH levels, typically from 0 to 14, with distinct colors corresponding to different pH values. Universal indicators are commonly used in laboratories and educational settings for pH testing.
How does Lugol's solution work as an indicator?
An indicator is a substance that changes colour in the presence of another substance. Let say inside the beaker are substances of both glucose and starch. The glucose and starch are of same colour. By injecting the lugol's solution into the beaker, the lugol's solution changes colour in the area of where starch is, while no colour changes in the presence of glucose. Thus, by using the Lugol's solution which only acts as indicator for starch and not glucose, we could tell part which area floats around with glucose and starch substances. Lugol's solution works as an indicator because it will stain starches due to iodine's interaction with the coil structure of the polysaccharide.
Why is litmus paper called a rough indicator?
Litmus paper is called a rough indicator because it provides a general indication of whether a substance is acidic or basic. It is not as accurate or precise as other indicators, such as pH meters, and can only give a rough idea of the pH level of a solution.
