A pond water sample was found to have 16 mg CaCO, in a 100.0 mL sample. Calculate the concentration of CaCO, in units of grains per gallon. concentration of CaCO, gpg What is the hardness classification based on the scale given in Table 1 of the lab procedure? very hard O moderately hard soft slightly hard hard

Fundamentals Of Analytical Chemistry
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Chapter13: Titrations In Analytical Chemistry
Section: Chapter Questions
Problem 13.11QAP
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Water Hardness Scale
gpg
mg/L CaCO: or ppm CaCO3
Classification
less than 1.0
less than 17.1
Soft
1.0 - 3.5
3.5 - 7.0
7.0 - 10.5
Slightly Hard
Moderately Hard
Hard
17.1 - 60
60 - 120
120 - 180
over 10.5
over 180
Very Hard
Table 1: Classification of WVater Hardness. Fairfax Water
Transcribed Image Text:Water Hardness Scale gpg mg/L CaCO: or ppm CaCO3 Classification less than 1.0 less than 17.1 Soft 1.0 - 3.5 3.5 - 7.0 7.0 - 10.5 Slightly Hard Moderately Hard Hard 17.1 - 60 60 - 120 120 - 180 over 10.5 over 180 Very Hard Table 1: Classification of WVater Hardness. Fairfax Water
A pond water sample was found to have 16 mg CaC0, in a 100.0 mL sample. Calculate the concentration of CaCO, in
units of grains per gallon.
concentration of CaCO,
gpg
What is the hardness classification based on the scale given in Table 1 of the lab procedure?
very hard
moderately hard
soft
slightly hard
hard
Transcribed Image Text:A pond water sample was found to have 16 mg CaC0, in a 100.0 mL sample. Calculate the concentration of CaCO, in units of grains per gallon. concentration of CaCO, gpg What is the hardness classification based on the scale given in Table 1 of the lab procedure? very hard moderately hard soft slightly hard hard
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