For a given solution, [ OH - ] pH , [ H 3 O + ] and whether the solution is acidic or basic has to be determined. Concept Introduction: pH: pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25 o C). It is the measurement of activity of free H + and OH - in solution. pH = − log [ H 3 O + ] pOH = − log [ OH − ] From ionization constant of water K w = [ H + ] [ OH - ] Ionization constant of water at 25 ο C K w = 1 × 10 − 14 . Less the pH , more is the acidity of the solution.
For a given solution, [ OH - ] pH , [ H 3 O + ] and whether the solution is acidic or basic has to be determined. Concept Introduction: pH: pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25 o C). It is the measurement of activity of free H + and OH - in solution. pH = − log [ H 3 O + ] pOH = − log [ OH − ] From ionization constant of water K w = [ H + ] [ OH - ] Ionization constant of water at 25 ο C K w = 1 × 10 − 14 . Less the pH , more is the acidity of the solution.
For a given solution, [OH-]pH, [H3O+] and whether the solution is acidic or basic has to be determined.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
In this solution [OH-] is greater than [H3O+] and pH is more than 7.00. Hence this solution is a basic solution.
Hence this is a basic solution having pH=9.86 and [H3O+]=1.4×10-10M.
(b)
Interpretation Introduction
Interpretation:
For a given solution, [H3O+] the value of [OH-], pH and whether the solution is acid or basic that has to be determined.
Concept Introduction:
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
In this solution [H3O+] is greater than [OH-] and pH is less than 7.00 and hence the solution is acidic.
Hence this is an acidic solution having [OH-]=1.6×10-12M and pH=2.20.
(c)
Interpretation Introduction
Interpretation:
For a given pH, the value of the [H3O+] and [OH-] of the solution has to be calculated along with the prediction that whether the solution is acidic or basic.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
As in this solution [H3O+] is greater than [OH-] and pH is less than 7.00 and hence the solution is acidic.
Hence this acidic solution have [OH-]=1.00×10-12M and [H3O+]=1.00×10−2M.
(d)
Interpretation Introduction
Interpretation:
For a given pH, the value of [OH-], [H3O+] and whether the solution is acid or basic that has to be determined.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
Predict the product of the following reaction.
1st attempt
HI
1
product
50300
Jul See Periodic Table
See Hint
P
Br
石尚
I
Indicate the substitutes in one place, if they are a diazonio room.
Indicate the product formed in each reaction. If the
product exhibits tautomerism, draw the tautomeric
structure.
a) о
+ CH3-NH-NH2
CO2C2H5
b)
+ CoH5-NH-NH2
OC2H5
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