Question

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).

Answer #1

**1) pH of acidic buffer = pka2 +
log(K2C4H4O4)/(H2C4H4O4)**

**no of mol of succinic acid = 0.73*0.0574 = 0.0419
mol**

** 5.865 = 5.636 +
log(x/0.0419)**

** x = 0.071**

**Amount of dipotassium succinate trihydrate =
n*Mwt**

**
=
0.071*248.32**

**
=
17.63 g**

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).

How many grams of dipotassium succinate trihydrate
(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 710.0 mL of a
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acid has pKa values of 4.207 (pKa1) and 5.636 (pKa2). (Note:
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acid, are 2.15, 6.82 and 12.38.

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How many grams of solid NaOH (Mol. Wt. = 40 g mol-1) must be
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