1) Buffer capacity depends on two quantities. What are they? Buffer capacity dep
ID: 903733 • Letter: 1
Question
1)
Buffer capacity depends on two quantities. What are they?
Buffer capacity depends on two quantities. What are they?
the range of pH values over which the solution can act as a buffer, and an equal ratio of conjugate acid to conjugate base
2)
A 1.0-L buffer solution is 0.120 M in HNO2 and 0.160 M in NaNO2.
Part A
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g HCl.
Express your answers using three significant figures separated by a comma.
Part B
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g NaOH.
Express your answers using three significant figures separated by a comma.
Part C
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g HI.
Express your answers using three significant figures separated by a comma.
3)
Why is the molar solubility of silver chloride lower in an aqueous solution of sodium chloride than in pure water?
Why is the molar solubility of silver chloride lower in an aqueous solution of sodium chloride than in pure water?
a high concentration of conjugate acid molecules in solution and the pH of the solution an equal number of conjugate acid and base molecules, and a high concentration of each how close the buffer is to having a 10:1 ratio of the buffer components, and having a high concentration of the componentsthe range of pH values over which the solution can act as a buffer, and an equal ratio of conjugate acid to conjugate base
2)
A 1.0-L buffer solution is 0.120 M in HNO2 and 0.160 M in NaNO2.
Part A
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g HCl.
Express your answers using three significant figures separated by a comma.
Part B
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g NaOH.
Express your answers using three significant figures separated by a comma.
Part C
Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g HI.
Express your answers using three significant figures separated by a comma.
3)
Why is the molar solubility of silver chloride lower in an aqueous solution of sodium chloride than in pure water?
Why is the molar solubility of silver chloride lower in an aqueous solution of sodium chloride than in pure water?
because the presence of extra chloride ion shifts the equilibrium of the AgCl dissolution reaction toward the undissociated silver chloride because solubility relies on concentrations of all the species in the dissolution reaction equation, and lower solubility means higher amounts of solid silver chloride because silver ions and sodium ions form a completely insoluble precipitate and fall out of the solution because sodium chloride takes up all the water and doesn't leave any interactions for the silver chloride, causing reduced solubilityExplanation / Answer
Solution 1
how close the buffer is to having a 10:1 ratio of the buffer components, and having a high concentration of the components
Solution 2
a) moles of HCL = 1.7/35.50= 0.04788
conc of HNO2 = 0.12 + 0.04788 / 1 = 0.16788 M
conc of NaNO2 = 0.16-0.04788/1 = 0.011212 M
b) Moles of NaOh = 1.7/40 = 0.0425
Conc of HNO2 = 0.12-0.0425 / 1 =0.0775 M
Conc of NaNO2 = 0.16+0.0425 /1 = 0.2025 M
Solution 3
because solubility relies on concentrations of all the species in the dissolution reaction equation, and lower solubility means higher amounts of solid silver chloride
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