MIL-DTL-450D
f. Funnel
g. Filter paper
h. 150-mL beaker
4.4.8.2 Reagents.
a. Distilled water
b. N/100 sulfuric acid
c. N/100 sodium hydroxide
d. Phenolphthalein indicator
4.4.8.3 Method.
a. Quickly weigh 10.0 � 0.5 grams of the sample in a clean, dry 150-mL flask and stopper
the flask.
b. Add 150 mL of distilled water and 10 to 12 drops of phenolphthalein indicator to a 250-
mL flask. Distilled water is acidic and is neutralized to the first perceptible pink color with
N/100 sodium hydroxide.
c. Carefully add 100 mL of the neutralized distilled water to the flask containing the sample,
and stopper the flask.
d. Bring flask to 38 �C in a water bath, then shake gently and swirl for 5 minutes.
e. Let flask stand for 15 minutes.
f. Filter solution through a funnel fitted with fluted filter paper. Collect the filtrate into a
clean, dry 150-mL beaker.
g. Transfer 80 mL of filtrate to a clean, dry 150-mL beaker.
h. When testing for alkalinity, if the solution has not changed color, sample is free of
alkalinity. If solution changes color, titrate solution with N/100 sulfuric acid until the solution
first turns colorless.
i. When testing for acidity, add 2 to 5 drops of phenolphthalein indicator to beaker and titrate
solution with N/100 sodium hydroxide to the first pink color.
14
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business
