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Why was universal indicator paper used to test the pH rather than placing universal indicator solution into the mixture?
Wiki User
∙ 9y ago
Use of paper avoid the contamination of the sample.
Wiki User
∙ 8y ago
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Can you use bicarb soda to clean jewelry?
Tarnished silver jewellery can be cleaned by wrapping it in aluminum foil, then placing it in a bicarbonate of soda solution.
What would be the effect of placing the standard sodium hydroxide in a beaker which contained some residual water in the breaker?
The standar solution is now falsified.
What procedure is used to separate and analyze DNA fragments by placing a mixture of DNA fragments at one end of a porous gel and supplying an electrical voltage to the gel?
agarose gel electrophoresis
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.
Why is it necessary to warm the thermometer before placing it into the solutions?
The thermometer reading will change from reading the solution temperature.
How do you dissolve ionic compounds?
By placing them in Water. This is called an aqueous solution.
How might placing a peptide into a non-polar solution affect the tertiary structure of the peptide?
Placing a peptide into a non polar solution can affect the tertiary structure. It can affect it by identify the relatively facile rotations.
how do i separate a mixture of starch and sugar?
One method is to use a process called chromatography. This involves placing a sample of the mixture onto a piece of filter paper. The filter paper is then placed in a container of a liquid solvent such as water. The solvent travels up the paper, carrying the mixture with it. As the solvent travels up the paper, the different components in the mixture separate and move at different rates, allowing you to separate the starch and sugar.
Placing an animal cell in a hypotonic solution will cause water to?
move into the cell
What kind of power converter do I need to power two small refrigerators and a blender?
You will need a large universal converter since you are placing two or more items into a socket.
What would be the effect of placing the standard sodium hydroxide in a beaker which contained some residual water in the breaker?
The standar solution is now falsified.
Can you use bicarb soda to clean jewelry?
Tarnished silver jewellery can be cleaned by wrapping it in aluminum foil, then placing it in a bicarbonate of soda solution.
What effect is produced from placing a cell in a strong salt solution?
Since solutions natural move from a higher concentration to a lower concentration, the solution is hyper-tonic. The salt will move rapidly into the cell, causing the cell to expand and then explode.
What procedure is used to separate and analyze DNA fragments by placing a mixture of DNA fragments at one end of a porous gel and supplying an electrical voltage to the gel?
agarose gel electrophoresis
Is there a chemical solution to remove copper inside wire?
yes, by mixing salt with nicotine and yeast, then adding hydocidenically modified acid which is found in your abdomen, you will get a pasty liquid which you boil, before placing the wire into the chemical. try to break the wire into at least 6 pieces. after that, pour mercury and alkaline into the mixture then drain the chemical. the copper will be removed with it. i tried this back at MIT in my schooling days.
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.
When a raw shell-less egg was placed in sugar solution the egg shrank. The egg was brought back to its original size by placing it in water. Which process does the experiment demonstrate?
osmosis
