0
Why is it necessary to perform a preliminary test on sample before doing hydroxamic acid test?
Wiki User
∙ 9y ago
The preliminary test before doing a hydroxamic acid test is to eliminate all phenols and enols that would give a false positive result when testing an unknown compound. Simply put, if using ferric hydroxamate, any color other than yellow will disqualify this test.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Why is it necessary to standardize the NaOH solution before titration?
It allows the concentration of the NaOH to be known.
Why is is not necessary to dry an Erlenmeyer flask before transferring the solid KHP to Na-OH?
vzcvz
Why would a risk assessment be necessary before a hydrogen refuelling station could be opened to the public?
Hydrogen is explosive.
Why is it necessary to remove all water from bromobutane before distilling it?
Removing all of the water is necessary because otherwise, the high heat during distillation will cause the water and bromobutane to react and form butanol.
Is it necessary to rinse the conical flask with some standard solution of oxalic acid before use?
I believe it is necessary to rinse the conical flask with oxalic acid before use, unless you are sure that the conical flask is really clean and dry before use. However to prevent having any types of unwanted chemical reaction when you pour the oxalic acid in the flask, it is best to rinse it with oxalic acid before use, so that there will not be errors like e.g. there is no pinkish color formed in the solution when you add the color indicator in the oxalic acid when doing titration.
What preliminary evaluation may be conducted prior to a mammogram?
At some centers, a technologist may perform a physical examination of the breasts before the mammogram.
Does it necessary to perform penicillin skin test before tazocin administration?
yes
What is the cleansing ritual before you read the Qur'an?
It is recommended, but not necessary, that you perform wudhoo (ablution) before you read the qur'an.
What are preliminary pages?
preliminary pages are the first pages of the book that appears before the text begins
How long can I use a plastic awning before it needs to be replaced?
A plastic awning can be used until it has worn out and doesn't perform the necessary task it was built to perform.
What is preliminary trial?
A premininary trial is done before hand to show the effectiveness of a method.
Why is it necessary to dry residual water with calcium chloride before distillation of tert-butyl chloride?
Tert-butyl chloride is not soluble in water. A solution is necessary to perform a distillation.
What is the meaning of preliminary meeting?
Preliminary meeting is a meeting before the actual meeting to discuss what they aer going to talk about in the main meeting
How many times can a preliminary hearing be continued in Pennsylvania before being dismissed?
how many times can a preliminary hearing be put of in pa
What does preliminary hypothesis mean?
Preliminary hypothesis is an educated guess made before any experiment is done. A hypothesis is an unproven theory or statement.
What is preoperative expenses and where it should be shown in the balance sheet?
Preoperative expense is expense incurred before starting operation of business i.e. Commercial operation all expense whether it is salary , fee of engineer , all expense which is necessary to start the operation needs to be capitalized under plant or building or machinery etc. Preliminary & preoperative are different. Preliminary is before incorporation of business while preoperative is after.
What is a preliminary test?
A test done before to compare with later tests.
