2. Calculate the normality of H+ in the 1:1 and 1:2 soil water suspensions. Show
ID: 483762 • Letter: 2
Question
2. Calculate the normality of H+ in the 1:1 and 1:2 soil water suspensions. Show calculations below. Does the difference in pH measured at these two dilutions reflect 2X dilution? If not, explain why not.
3. Most laboratories perform EC measurements using a 1:2 suspension, and then express the results to a saturated extract basis (ECse) by multiplying by 2. What was the electrical conductivity of the 1:2 soil suspension and the calculated ECse
131 soil water 112 soil water 1 Cact 122 cacL Requirement conductivay Sorin Soln Solin Soil Solin Soil Data Sheet Sample
Explanation / Answer
The pH value is a measure of acidity or alkalinity.when the soil is diluted with water most of the H+ ions are not released into suspension.
The addition of small amount of CaCl2 results in the release of more H+ ions are released into suspention and results in lowering of pH value.
Advantages of using CaCl2
1. The CaCl2 mask the variability in salt content of soils
2. It eliminates suspension effects.
3. Results are more reproducible
Disadvantage of using CaCl2
1. Readymade calcium chloride solution cannot be used.
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