pH = 9
so, pOH = 14-pH = 5
now,
pOH = pKb + log([NH4Cl]/[NH3])
given, Kb = 1.8x10-5
so, pKb = -log(1.8x10-5) = 4.745
and
[NH3] = 0.1 M
so, put values
5 = 4.745 + log([NH4Cl]/0.1)
solving, [NH4Cl] = 0.18 M
so,1 liter solution has 0.18 moles
so 2.3 liter solution must have 2.3*0.18 = 0.414 moles of NH4Cl
molar mass of NH4Cl = 53.49 gm/mol
so mass of NH4Cl to be added = 0.414*53.49 = 22.14486 gm
How many grams of dry NH4Cl need to be added to 2.30 L of a 0.100 M solution of ammonia,NH3, to prepare a buffer soluti...
How many grams of dry NH4Cl need to be added to 1.70 L of a 0.100 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.62? Kb for ammonia is 1.8×10−5.
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.500 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.500 M solution of ammonia, NH3,to prepare a buffer solution that has a pH of 8.79? Kb for ammonia is 1.8*10^-5.
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.400 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.67? Kb for ammonia is 1.8×10−5.
How many grams of dry NH4Cl need to be added to 2.40 L of a 0.400 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.78? Kb for ammonia is 1.8 x 10^-5.
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.500 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.76? Kb for ammonia is 1.8×10−5. Express your answer with the appropriate units.
How many grams of dry NH4Cl need to be added to 2.00 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8×10−5. Express your answer with the appropriate units.
4B. How many grams of dry NH4Cl need to be added to 1.80 L of a 0.100 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.93? Kb for ammonia is 1.8×10^−5. Express your answer with the appropriate units.
How many grams of dry NH4ClNH4Cl need to be added to 2.50 LL of a 0.800 MM solution of ammonia, NH3NH3, to prepare a buffer solution that has a pHpH of 8.86? KbKbK_b for ammonia is 1.8×10−51.8×10−5.
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.56? Kb for ammonia is 1.8×10−5.