acid consumption
English translation: this would be a measure of the alkalinity of the water...
| 08:01 Jul 14, 2005 |
| English language (monolingual) [PRO] Science - Chemistry; Chem Sci/Eng / air conditioning | |||||||
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|  Selected response from: Balasubramaniam L. India Local time: 06:45 | ||||||
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| SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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| 3 +3 | this would be a measure of the alkalinity of the water... |
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Answers
49 mins confidence: 
peer agreement (net): +3
peer agreement (net): +3this would be a measure of the alkalinity of the water... Explanation: It perhaps means the amount of acid that would be required to neutralize the alkanity of the sample and would therefore be a measure of the alkanity of the water sample. -------------------------------------------------- Note added at 54 mins (2005-07-14 08:55:28 GMT) -------------------------------------------------- UNC-A VWIN Water Quality Parameters The pH is an important water quality parameter because it has the potential to ... Alkalinity is the measure of the acid neutralizing capacity of a water. ... ljea.org/parameters.html -------------------------------------------------- Note added at 55 mins (2005-07-14 08:56:56 GMT) -------------------------------------------------- http://ljea.org/parameters.html#top -------------------------------------------------- Note added at 59 mins (2005-07-14 09:00:37 GMT) -------------------------------------------------- Quantitatively, alkalinity is the capacity of the water to react with acid to a specific pH end point. The value obtained will depend on the indicator used. Two measures of alkalinity are conventionally applied - Alkaphot M (Alkalinity to methyl orange) and Alkaphot P (alkalinity to phenolphthalein). http://www.palintestusa.com/reasons_for_testing_certain_para... -------------------------------------------------- Note added at 1 hr 6 mins (2005-07-14 09:08:08 GMT) -------------------------------------------------- Alkalinity: For this measurement you use a Hach digital titrator and alkalinity test kit, which contains 100mL measuring cylinder, conical flask, 0.16N sulfuric acid cartridge, Bromcresol red green indicator pillows, digital titrator and dispensing tube. The measurement is performed on 100mL of filtered sample. Assemble the titrator. Place an acid cartridge in the end of the titrator and rotate it to lock it in position. Remove the cap from the tip of the acid cartridge and insert a dispensing tube. Slide down the piston into the acid cartridge until it touches the plunger inside the cartridge. Turn the knob on the titrator until acid starts to come out of the dispensing tube. Keep turning until all air is removed from the tube, then wipe off excess acid from the end of the tube. Re-set the counter on the titrator to zero. Rinse the measuring cylinder and conical flask with deionised water and then pour away the water used. Try to remove as many drops as possible. Pour exactly 100mL of sample into the measuring cylinder, and then transfer to the conical flask. Add the contents of one Bromcresol red-green powder pillow and shake gently until the sample turns a uniform green colour. Insert the dispensing tube on the titrator into the sample and start adding acid by turning the knob on the titrator. Gently swirl the sample as acid is added and watch for a colour change to light pink. When you see this, stop adding acid. If the colour reverts to green, add a little more acid. Repeat until the colour remains pink. Then read the number on the counter on the titrator. Multiply this number by 2 to determine the total alkalinity in meq l-1 of bicarbonate. Make sure you used the 0.16N acid - if by chance you used 1.6N acid, you need to multiply the count on the titrator by 20 instead of 2. Discard the sample, rinse the measuring cylinder and flask in deionised water. Re-set the counter on the titrator to zero before proceeding to the next measurement. The bicarbonate concentration in ìeq l-1 is converted to mg/litre by multiplying by 0.0614. http://66.249.93.104/search?q=cache:U_EcKN11ZZgJ:courses.eas... |
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