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dissolve KOH powder in ethanol
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∙ 12y ago
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Why use ethanolic KOH?
ethanolic KOH can precipitate the impurities in solution
What is the base hydrolysis of piperine?
By addition of 10% ethanolic KOH, water and HCl
Why do you use KOH ethanol for the isolation of piperine and What are their uses?
I assume you mean ethanol + KOH? if so, in order to prevent co-precipitation of piperine and the resin acids, dilute ethanolic KOH is added to the concentrated extract to keep acidic materials in solution as their potassium salts (acid/base rxn occurs). basically it keeps impurities in solution, while piperine precipitates out.
What mass of KOH is needed to make 400mL of 725 M KOH?
I assume you mean 7.25 M KOH, but the process is the same anyway.Molarity = moles of solute/Liters of solution ( 400 ml = 0.4 Liters )7.25 M KOH = X moles KOH/0.4 Liters= 2.9 moles KOH (56.108 grams/1 mole KOH)= 163 grams potassium hydroxide needed===============================
What is the formula for the ionic compound from potassium hydroxide?
K+ and OH- is KOH -----------
Why use ethanolic KOH?
ethanolic KOH can precipitate the impurities in solution
What is the base hydrolysis of piperine?
By addition of 10% ethanolic KOH, water and HCl
Why do you use KOH ethanol for the isolation of piperine and What are their uses?
I assume you mean ethanol + KOH? if so, in order to prevent co-precipitation of piperine and the resin acids, dilute ethanolic KOH is added to the concentrated extract to keep acidic materials in solution as their potassium salts (acid/base rxn occurs). basically it keeps impurities in solution, while piperine precipitates out.
How do you isolate 4-Hydroxyisoleucine from fenugreek seeds?
Ethanolic extraction will give 4hydroxyisoleucine.......
Is perfume heterogeneous or homogenous?
A perfume is a homogeneous mixture, generally an ethanolic solution.
What mass of KOH is needed to make 400mL of 725 M KOH?
I assume you mean 7.25 M KOH, but the process is the same anyway.Molarity = moles of solute/Liters of solution ( 400 ml = 0.4 Liters )7.25 M KOH = X moles KOH/0.4 Liters= 2.9 moles KOH (56.108 grams/1 mole KOH)= 163 grams potassium hydroxide needed===============================
How do you make a 1 percent aqueous solution of potassium hydroxide?
1% solution of KOH contains 1g of KOH in 100g of solution. This means that you need to mix 1g of KOH and 99g of water.
What is the formula for the ionic compound from potassium hydroxide?
K+ and OH- is KOH -----------
How do you make potassium chloride with H20?
When KOH reacts with HCl, these products are formed. This is a neutralization reaction. KOH is a base while HCl is an acid.
Calculate the number of grams of solute that would be needed to make 2.5 L of 0.800 M KOH?
0.800 M KOH (1mol/2.5L)(56.1g KOH/1mol)It's set up stoichiometrically, but hard to show that here... 0.800 M KOH / 2.5 L x 56.1gYour answer should come out 17.952 g KOH. If you're following sig figs, then your answer should come out 18. g KOH
How many moles are in 234.1 grams of KOH?
Molar mass of KOH = 39.1+16.0+1.0 = 56.1Amount of KOH = mass of sample / molar mass = 32/56.1 = 0.570mol
How do you make 0.1m KOH?
An 11 M KOH solution indicates there are 11 moles of KOH per liter of water. 1 mole of KOH has a volume of 27.4 mL, so to account for the added volume it is necessary to add 15.75 moles of KOH per liter of water, or 884 grams per liter.
