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Subject: Also make a correction based upon the acidity found in test for acidity chem. Подскажите, пожалуйста, как правильно перевести предложение "Also make a correction based upon the acidity found in test for acidity". Ни где не могу найти связь титрования с поправкой на кислотность... Может я не правильно понимаю, но я бы перевела так: "Также сделать поправку с учетом кислотности, установленной в ходе испытания на кислотность".
Есть поправка на титр или нормальность, а на кислотность не могу найти...Standardization of Formaldehyde solution (35-37%):
Weigh accurately about 3.0 ml of Formaldehyde solution to a tared flask containing 10ml of water. Add 50ml of 1 N NaOH and add slowly through a small funnel, 50ml of Hydrogen peroxide that has been previously neutralized to bromothymol blue with 1N NaOH. Heat the mixture cautiously on a steam bath for 15 min. and shake it occasionally with a rotary motion.
Allow the mixture to cool, rinse the funnel and inner wait of the flask with water and after allow it to stand for 30mins, add 2- 5 drops of bromothymol blue and titrate the excess alkali with 1 М H2SO4. Perform a blank determination. (Also make a correction based upon the acidity found in test for acidity).
Each ml of 1N NaOH is equivalent to 30,03 mg of formaldehyde. Спасибо!
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