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Which fat sample will require more KOH for complete saponification cottonseed oil or the same mass of lard?
Wiki User
∙ 15y ago
The lard sample will require more KOH for complete saponification. This is because lard is a saturated fat, and therefore the molecules are more closely packed together. This means that there are more bonds that need to be broken in order to saponify the fat.
David Denton
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How do you calculate saponification value?
(AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. (AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. -divya
How much urine do they require for sample?
Routine urine is 12 mL.
Does each sample have measurable mass?
The answer depends on sample of WHAT!
What are the importance of indicators in volumetric analysis?
Indicators change the colours when the PH of the sample changes. So during titration when the reaction is complete a new product will form which is resulting in sudden change of PH. This can be detected by the change in the colour of the sample. The reaction may be neutralization reaction or Redox reaction. So to know the exact stoichiometric quantity of reagents to complete a reaction we must use Indicators. different indicators give different colours based on the PH.
A sample collected by drilling into Earth's surface with a hollow drill and pulling out a column of soil and rocks?
a core sample
Why does triacylglycerides with longer fatty acids have lower saponification number than those shorter fatty acids?
The saponification number is measure of the number of saponifiable sites (i.e. -esterified or unesterified- acyl groups, by reaction with OH-) per (AND HERE COMES THE CLUE)1 gram of tested sample.Just imagine you have 2 samples: L(ong) and S(hort) with the SAME amount of saponifiable sites per molecule (or mole), so they both react with the same amount of reactant (KOH or NaOH).If it were 'per mole' then the saponification numbers would be equal, won't they?BUT saponification number is per 1 gram, and as the Long chained triacylglycerides in sample L do have a higher molecular mass, there are less molecules (or moles, or sapon. sites) of them in 100 grams. Thus sample L has a lower saponification number than sample S.In this way the saponification number is a measure of the average molacular mass (also of average chain length) of triacylglicerides (i.e. normal fats) though under certain restrictions.
What does the 12 amendndment require?
fasting blood sample
How do you calculate saponification value?
(AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. (AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. -divya
What sample size is sufficient for stat?
A sample size of one is sufficient to enable you to calculate a statistic.The sample size required for a "good" statistical estimate will depend on the variability of the characteristic being studied as well as the accuracy required in the result. A rare characteristic will require a large sample. A high degree of accuracy will also require a large sample.
How much urine do they require for sample?
Routine urine is 12 mL.
Are blood glucose tests painful?
A blood glucose test will require that you have blood drawn for a blood sample so that your glucose levels can be determined to be normal or not. Getting a blood sample will require that a lab technician perform a phlebotomoy where a small needle is used to pierce the skin and draw a small blood sample from the body.
Is a portion of the sample space?
Would you please be sure to complete your question when you resubmit it.
When a researcher limits a sample to a group of his or her personal friends in order to minimize non-response errors the sample is referred to as?
A complete waste of everyone's time!
When should a phlebotomist label a blood sample?
after drawing blood and complete blood etraction
Which blood tests require you to fast?
for lipid profile require fasting blood sample (atleast 12-14hrs). fasting blood glucose. etc. etc.
Where can I find a California Achievement Test sample online for free?
There is no CAT sample test online, but there is some questions you can complete online that might be in the test.www.free-test-online.com
Is there a blood glucose monitoring system that doesn't require to prick anywhere in the body for a blood sample?
No. Because read one's blood glucose level requires analyzing a sample of that blood.
