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Yellow! Fa sho!
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∙ 15y ago
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Why does BTB turn green?
When we resperate, we release carbon dioxide. Plants take that in to make oxygen. BTB can not do anything with the carbon dioxide. Only if you add a plant in the container with the BTB, you can make it it's blue color again. A fun experiment is to add soda, like coke, to BTB and see if it changes.
What happens when you add MgNO32 to NaOH?
it explodes
As edta dissolves in water the h will increase to achieve a pH 8.0 would you need to add hcl or naoh?
you have to add naoh because in water only sodium salt of EDTA will dissolve.
How can you experimentally dilute 0.13molar sodium hydroxide?
Depends on your starting concentration, if it is 1.0M NaOH and you are trying to get to 0.13M. Simply measure 7mL of 1.0M NaOH, add 93mL of distilled water and mix it and you then have 0.13M NaOH.
How do you prepare thymol blue indicator?
Bromothymol Blue (BTB)Bromothymol blue is an indicator, a substance that changes color as the pH of a solution changes. Bromothymol blue is yellow in acidic solutions and blue in basic solutions.BTB can be prepared by mixing 0.1 g (a pinch) of bromothymol blue powder in 10 mL of a 4% solution of sodium hydroxide.Add 20 mL of alcohol and dilute to 1 L with distilled water.The solution should be deep blue.If it is green, add sodium hydroxide solution drop by drop until the solution turns blue.Bromothymol blue can be purchased from scientific supply houses.CAUTION: Sodium hydroxide is corrosive; the BTB solution should be prepared in a laboratory. BTB stains hands and clothes. Have students wear goggles and follow safety precautions when using BTB solution.
How does soda effect BTB?
Soda effects BTB when you add it to the BTB. Soda has carbon dioxide in it, which makes it foamy. BTB is used as an indicator of chemicals with a weak acid and base. When you add the carbon dioxide it will change into a green like color.
Why does BTB turn green?
When we resperate, we release carbon dioxide. Plants take that in to make oxygen. BTB can not do anything with the carbon dioxide. Only if you add a plant in the container with the BTB, you can make it it's blue color again. A fun experiment is to add soda, like coke, to BTB and see if it changes.
What is the procedure for determining the percentage purity of amino acid sample by sorenson formol titration method?
prepare about 1 to 1.5% solution of amino acid in 100 ml volumetric flask take 10 ml of the sample (amino acid) solution into 250 ml conical flask add phenophtalien indicator and titrate it against 0.1N standard NaOH when pink color appear stop the titration and add formalin untill the pink color disappear again titarte it with standard NaOH till the pink color reappear.
What is the color produced when you add the phenolphthalien to sodium hydroxide solution?
You will get a pink to a pinkish-red solution depending on how concentrated the sodium hydroxide (NaOH) is.
What happens when you add NAOH to Hydrogen?
Nothing.
What happens when you add MgNO32 to NaOH?
it explodes
What color will appear if you add green light to red and blue lights?
yellow-green
How do you neutralise on acid?
Add a base, such as NaOH, NH3, or LiOH
As edta dissolves in water the h will increase to achieve a pH 8.0 would you need to add hcl or naoh?
you have to add naoh because in water only sodium salt of EDTA will dissolve.
How do you prepare 0.25N of sodium hydroxide?
add 10 grams of NaoH into 1000 ml water, it will give you NaoH of 0.25N. As for making 1N solution you need to disolve 40 grams of NaoH into 1 litre water.
How can you experimentally dilute 0.13molar sodium hydroxide?
Depends on your starting concentration, if it is 1.0M NaOH and you are trying to get to 0.13M. Simply measure 7mL of 1.0M NaOH, add 93mL of distilled water and mix it and you then have 0.13M NaOH.
What happen when zinc granules are add to NaOH?
In this case sodium zincate is formed.
