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Why do you not add the indicator at the test tube at the beginnin?
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What is the procedure for hemagglutination test?
1.Take 8 to 12 test tubes and label them.. 2. Add 5 ml saline in each tube to provide isotonic medium.. 3.Add 5 cc blood sample in each tibe 4.Add 1 ml solution containing antibodies 5.Mix and shake gently 5.Took half of first test tube and add to 2nd tube then took half of 2nd tube and add to 3rd tube and son...It is serial dilution..Leave the last tube as such .dnt add antibodies in it..It is Control 6.Keep all test tubes in water bath at temp 37 deg C for 30 min 7.refrigerate them overnight at 4 deg C 8.Check agglutination in the tubes caused by Ag - Ab complex 9. Check the last tube having agglutination..Suppose its dilution is 1:32,then the titer of Ab will b 32.. BY:::dr sakhawat ali
What materials will you need to test for starch?
Use Iodine as an indicator. Just add it to your sample and the orange-brown colour will turn blue-black in the presence of starch.
When you add four drops of lime water to a test tube containing a gas what is its appearance when th limewater changes?
you ballz will smell like fish
What happens when you add universal indicator to water?
A change of color specific for acids, red-brown for Merck pH indicators.
Describe how to carry out simple controlled experiments to illustrate how enzyme activity can be affected by changes in temperature?
· Add 2cm^3 of amylase to a test tube · Add 2cm^3 of starch · Add a few drops of iodine · Place test tube into water bath at a certain temperature · Observe colour changes every 2 minutes · Record time taken for iodine to change back to yellow · Repeat the experiment at different temperatures
How can a half test tube of sugar and a half test tube of water add up to one full test tube?
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What to add to make water fizz?
1. Collect 5 test tubes, test tube rack and a measuring cylinder. 2. Label the test tubes 1 to 5. 3. Put 2 spatula measures of sodium hydrogen carbonate or sodium carbonate into test tube 1. 4. Put 5cm3 of water into test tube 2. 5. Put 1cm3 of indicator into test tube 3. 6. Put 5cm3 of ethanoic acid into test tube 4. 7. Put 5cm3 of ethanoic acid into test tube 5.
What measurements would you make to determine the average mass of a heaping microspatula of NaCl?
You would obtain a test tube, measure the mass of the test tube. Then add the NaCl to the test tube and measure the mass. Then subtract the mass of the test tube from the mass of the test tube+the NaCl to find the mass of the NaCl.
What test can you know if it is a acid or base?
use a universal indicator or add an acid to see the results
How do you measure exactly 60g of salt in a test tube?
First we measure the test tube on the weight machine and note it . let the wieght be 'a' grams. After that keep putting the salt in the tube until the weight of the test tube ,with salt in it, is = (a + 60) grams . If u accomplish this that means that the salt in the tube is exactly of 60 grams :) .
What happens to the level of water in a test-tube as hydrogen is produced?
Ya... In a test tube add some aluminum foils and some amount of NaOH... Introduce the flame near mouth of the test tube... Then see the magic...
Which is the hexane layer?
In a Halide Test, you can add an unknown solution into a test tube and add hexane solution plus several other solutions called by the procedure. Shake the test tube and record the upper hexane layer. So the answer would be hexane is present in the upper layer.
What is the procedure for Benedict?
You must take the testing object, then add Benedict's solution in a test tube. Then in a boiling beaker of water, place the test tube in. Let it sit there and see if there is any color change or precipitated materials.
What is the procedure for hemagglutination test?
1.Take 8 to 12 test tubes and label them.. 2. Add 5 ml saline in each tube to provide isotonic medium.. 3.Add 5 cc blood sample in each tibe 4.Add 1 ml solution containing antibodies 5.Mix and shake gently 5.Took half of first test tube and add to 2nd tube then took half of 2nd tube and add to 3rd tube and son...It is serial dilution..Leave the last tube as such .dnt add antibodies in it..It is Control 6.Keep all test tubes in water bath at temp 37 deg C for 30 min 7.refrigerate them overnight at 4 deg C 8.Check agglutination in the tubes caused by Ag - Ab complex 9. Check the last tube having agglutination..Suppose its dilution is 1:32,then the titer of Ab will b 32.. BY:::dr sakhawat ali
How would you test for the presence of fat?
Get a brown paper bag and rub the food onto it. If the food has fats in it then the paper bag where you have rubbed the food onto it will turn translucent (lets light pass through but not see through) We did this experiment at St Michael's Grammar school in Victoria. I am in year 8.
How would you test food substances for lipids?
first take about 1ml of absolute ethanol in a test tube and add a little amount of oil to it.and then dessolve the lipids by shaking vigorously and place it to seperate them.lastly decant the alcohol into a clean test tube and add a few drops of cold water containing alcohol and then observe.
How do you measure the amount of vitamin C in juice?
we can measure the amount of vitamin C in juice through of samples and then we need to make tests analyzing the ozidizing agents... caca batty my answer will be..... 1. Mix 1 tablespoon of cornstarch into enough water to make paste. 2. To this paste, add 250ml of water and boil for 5 minutes. 3. Add 10 drops of the starch solution to 75 ml of water (use an eyedropper). 4. Add enough iodine to produce a dark purple-blue color. Now your indicator solution is ready. 5. Put 5ml of indicator solution (about 1 tablespoon) in a 15ml test tube. To the test tube, use a clean eyedropper to add 10 drops of juice. Re-clean the eyedropper for each sample. 6. Hold the test tube against a white background. Line up the tubes from lightest to darkest purple. The lighter the solution, the higher the vitamin C content. That's because vitamin C causes the purple indicator solution to lose its color. this is the solution about how you measure the amount of vitamin C..... actually.....i think mine is better than the one at the top tee hee
