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What does the color that appears on a wide range indicator paper show?
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Why does the typical base indicator exhibit its color change over a range of about 2 PH units?
The usual range of the color change on the indicator is between 1.5-2 pH units because of the sensitivity of the indicators. The universal indicator is used in most test.
If the equivalence point of a titration is 5 what range of pH should the indicator be?
The indicator should change color right at the equivalence point, so 5.
What does an indicator have to have to be an indicator?
An indicator has to be able to change colors as the pH of the solution approaches ithe indicators pH range. For example, universal indicator starts out as a yellowish color in an acidic solution, then as it grows more neutral(more towords 7) it becomes a greener color, and as it grows more basic, it starts to become a blue color. Universal indicator will give you an indication of HOW acidic or alkaline a solution is, depending on the exact color. Litmus can only turn red or blue and can't distinguish between differing amounts of acid or base
What is the name of the indicator that gives you the range of colours for different pH numbers?
Universal indicator...
How can macromolecules be detected in foods?
We just did this in class and I am working on the lab write-upright now, haha. Ok, to detect macromolecules in foods you use chemical indicators. An indicator is a substance that changes to indicate the presence of a particular compound or type of compound. The indicator may change color or temperature, or produce some other substance, such as, bubbles or a distinctive odor. The change in the indicator is due to a chemical reaction between the indicator and the tested substance. Indicators are very specific and work based on the chemical composition of the indicator and of the substance being detected. Some indicators are sensitive to temperature, pH, and other environmental conditions so it is necessary to know the optimal conditions for using each indicator. Generally, the easiest indicators to use are ones that change color to indicate the presence of a substance. Here are some different tests: Benedict's solution is an indicator that can be used to test for monosaccharides (simple sugars). Benedict's solution is light blue in color. However, when it is heated in the presence of simple sugars, it turns from blue to green or yellow/orange or even to red. The final color depends on the amount and type of monosaccharide. Benedict's solution needs to be heated to work properly.(Or you can use a glucose strip, its much easier, its a piece of paper and you put the end with the colored square in the substance and if it changes color then it has sugar in it) Lugol's Iodine can be used as an indicator for starch. Lugol's Iodine is yellow or light brown in color; in the presence of starch, it turns dark purple or even black. Biuret solution is a protein indicator. Biuret solution is a light blue color; in the presence of protein, the color changes to violet or purple. The shade or darkness of the color depends on the type and concentration of the protein, and can range from a very light violet to a deep purple. Fats and lipids leave a translucent mark on brown paper. Translucent means light can pass through, although distinct images may not be seen through it. Moist foods can be applied directly to brown paper to test for lipids; dry foods can be tested once they are made into an alcohol extract. This is done by grinding the food and placing it in alcohol, and applying samples of the liquid extract to the paper.
An indicator does which one of the following in the presence of acids and bases?
Indicators can be used to determine if a substance is a acid or a base because of the reaction that occurs between the substance and the indicator. This creates a color change in the indicator (depending on which indicator you use). If it is a universal indicator, the substance may change from deep red to violet. If it is a litmus indicator, it will only turn either red or blue.
What is meant by the transition interval of an indicator?
The pH range over which an indicator changes color.
The pH range over which an indicator changes color is its?
transition interval
Is it false that Indicator paper is used to identify acids and bases?
A pH indicator paper can be used to tell if a solution is acidic or basic and the rough pH range can be known
What color range did the substance show when tested with the indicator paper?
Indicator paper is a common name for litmus paper. Litmus paper tests pH. The color range is red to purple, when red is very acidic (pH of 1) and purple is very basic (pH of 14). In between the spectrum are the other pH values. Green is neutral (a pH of 7). Yellow and orange are acids also, ranging from a pH of 2-6. Teal and blue are bases, with pH ranging from 8-13. Hope this helps!
What is the difference between universal strips and narrow indicator strips?
Universal strips will show a wide range of pH values, but the color range between pH values is limited. The narrow strips will show a wider range of colors, but won't show you anything outside the range of the pH paper.
Why does the typical base indicator exhibit its color change over a range of about 2 PH units?
The usual range of the color change on the indicator is between 1.5-2 pH units because of the sensitivity of the indicators. The universal indicator is used in most test.
If the equivalence point of a titration is 5 what range of pH should the indicator be?
The indicator should change color right at the equivalence point, so 5.
What is litmus solution?
yes it is
In a pH test how much wide range indicator to use for 5 ml?
A pH paper can be used also for a small sample.
What is the original color of universal indicator?
The colour of universal indicator is depending on pH pH Range and corresponding color: 0-3 red 3-6 orange yellow 7 green 8-11 blue 11-14 violet purple
What is the colour of pH paper of hcl?
On the pH-paper Meck art .9565 the acidic range color is green to red-brick.
