Question

How many grams of sodium succinate (formula weight 140 g/mol) and disodium succinate (formula weight 162 g/mol) must be added to 1 L of water to produce a solution with pH 6.0 and a total solute concentration of 50 mM? Pka=5.64

Answer #1

How would you prepare a .100 L of 50mM succinate buffer at pH
3.85 using solid disodium suddinate, DI water and either 1.00 M
NaOH or 1.00 M HCL. The formula weight of disodium succiante is 162
g/mol. pka1 = 4.21; pka2 = 5.64.

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 730.0 mL of a
0.0574 M succinic acid solution to produce a pH of 5.865? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 610.0 mL of a
0.0460 M succinic acid solution to produce a pH of 5.956? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 710.0 mL of a
0.0485 M succinic acid solution to produce a pH of 5.844? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 800.0 mL of a
0.0568 M succinic acid solution to produce a pH of 5.968? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 540.0 mL of a
0.0329 M succinic acid solution to produce a pH of 5.966? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2).

The pKs of succinic acid (HOOC-CH2-CH2-COOH) are 4.21 and 5.64.
How many grams of monosodium succinate (NaOOC-CH2-CH2-COOH) and
disodium succinate (NaOOC-CH2-CH2-COONa) must be added in order to
prepare 1 L of a 0.1M buffer at pH 5.28? Give your answer in grams
of monosodium succinate and grams of disodium succinate,
respectively.

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 710.0 mL of a
0.0304 M succinic acid solution to produce a pH of 5.989? Succinic
acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2). (Note:
324.45g is not correct)

How many grams of potassium dihydrogen phosphate (MW=136.09
g/mol) and dipotassium hydrogen phosphate (MW=174.18 g/mol) would
be needed to produce a 2 L buffer solution of pH 6.8 at 100 mM
solute concentration? The pKa’s for phosphoric acid, a triprotic
acid, are 2.15, 6.82 and 12.38.

1. How many grams (to the nearest 0.01 g) of NH4Cl
(Mm = 53.49 g/mol) must be added to 650. mL of 0.951-M
solution of NH3 in order to prepare a pH = 10.50
buffer?
2. What volume (to the nearest 0.1 mL) of 4.40-M HCl must be
added to 0.450 L of 0.150-M K2HPO4 to prepare
a pH = 6.60 buffer?

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