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Why is it necessary to wait 10 minutes before adding IKE solution to the test tubes?
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Why is it necessary to cool the filtrate before adding the methylene chloride?
It will explode if you don't!
Why the NaOH solution is heated before adding BaCl2 in the two solutions method for determination of purity of NaOH sample?
Why the NaOH is heated before adding in BaCl2 for determination of purity of NaOH sample?
Why would you wait 5 minutes before spraying Lugol's solution?
Comen sence you dip sticks
Purpose of adding NaOH to the mixture before taking the polarimeter reading?
To neutralize the solution and to prevent the complete hydrolysis of sucrose into glucose and fructose.
Why must the sugar solution be cooled before adding yeast?
It's not clear in what context this question is asked, but hot water can kill yeast.
Why is it necessary to dry the ice before adding to the water?
It is not necessary.
Before adding or subtracting two fractions they are converted into like fractions Explain with examples why this is necessary?
Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
Why is it necessary to cool the filtrate before adding the methylene chloride?
It will explode if you don't!
Why is it necessary to shake an oil and vinegar salad dressing before it to a salad?
It is necessary to shake an oil and vinegar salad dressing before adding it to a salad because they separate easily.
Why the NaOH solution is heated before adding BaCl2 in the two solutions method for determination of purity of NaOH sample?
Why the NaOH is heated before adding in BaCl2 for determination of purity of NaOH sample?
Why is it necessary to standardize the NaOH solution before titration?
It allows the concentration of the NaOH to be known.
What is the purpose of adding NaOH to the mixture before taking the polarimeter reading?
It is to neutralize the solution and to stop the hydrolysis.
Why is it necessary to put some sugar with the yeast before adding it to the dough?
because it helps the fermentation of the yeast.
Why is the glucose solution boiled first before adding the yeast suspension?
The glucose solution is boiled then allowed to cool before you add the yeast because boiling water will kill the yeast.
Why is an aqueous solution usually first acidified with dilute nitric acid before adding aqueous lead nitrate?
To keep the kead nitrate in solution: otherwise it might precipitate lead.
Why would you wait 5 minutes before spraying Lugol's solution?
Comen sence you dip sticks
What is necessary to shake an oil and vinegar salad dressing before adding it to a salad?
Vinegar and oil will separate. Shaking it mixes them together.
