Consider the following data on some weak acids and weak bases: acid base Ka K, name formula name formula HNO2 | 4.5 x 10 -4 -5 nitrous acid ammonia NH3 1.8 x 10 hydrocyanic acid HCN 4.9 x 10-10 hydroxylamine HONH, |1.1 × 10-8 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'i' next to the solution that will have the lowest pH, a 2' next to the solution that will have the next lowest pH, and so on. solution pH 0.1 M NaCN choose oneO 0.1 M KNO2 choose one O 0.1 M KCI choose one 0.1 M NH4BR choose one O

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter15: Solutions Of Acids And Bases
Section: Chapter Questions
Problem 15.114QE
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1 being the lowest and 4 being the highest 

Consider the following data on some weak acids and weak bases:
acid
base
Ka
K,
name
formula
name
formula
HNO, | 4.5 x 10
-4
NH3
nitrous acid
ammonia
1.8 × 10
-10
4.9 × 10
-8
hydrocyanic acid
HCN
hydroxylamine HONH, | 1.1 x 10
Use this data to rank the following solutions in order of increasing pH. In
other words, select a 'i' next to the solution that will have the lowest pH, a '
2' next to the solution that will have the next lowest pH, and so on.
solution
pH
0.1 M NaCN
choose one O
0.1 M KNO2
choose one O
0.1 М KСI
choose one O
0.1 M NH4BR
choose one O
Transcribed Image Text:Consider the following data on some weak acids and weak bases: acid base Ka K, name formula name formula HNO, | 4.5 x 10 -4 NH3 nitrous acid ammonia 1.8 × 10 -10 4.9 × 10 -8 hydrocyanic acid HCN hydroxylamine HONH, | 1.1 x 10 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'i' next to the solution that will have the lowest pH, a ' 2' next to the solution that will have the next lowest pH, and so on. solution pH 0.1 M NaCN choose one O 0.1 M KNO2 choose one O 0.1 М KСI choose one O 0.1 M NH4BR choose one O
Expert Solution
Step 1

We have to find the pH according to Handerson Hasselbatch equation. 

pH = pKa + log [Salt]/[Weak Acid]

pOH = pKb + log [Salt]/[Weak Base]

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