Question

In need of help

1 – List four factors that affect the strength of an acid. All four may not apply to every acid.

2 – Calculate [OH-] for a 1.4 x 10-3 M HCl solution.

3 – Calculate the pH of an aqueous solution at 25 ̊C at is 0.34 M in phenol (Ka = 1.3 x 10-10)

.4 – Calculate the concentration at which a monoprotic acid with Ka = 4.5 x 10-5 will be 2.5% ionized. (The percent ionization will yield the ratio of reactants and products at equilibrium.)

5 – Calculate the concentrations of H+, HCO3- and CO32- in a 0.025 M H2CO3 solution.

6 – Classify the following as a Lewis acid, Lewis base, both or neither:CO2, H2O, I-, SO2, NH3, OH-, H+, BCl37 –

7-Calculate the pH of a solution that is 0.20 M NH3 and 0.30 M NH4Cl.8 –

8-The pH of blood plasma is 7.40. Assuming the principal buffer system is HCO3-/H2CO3, calculate the ratio [HCO3-]/[H2CO3]

.9 – A 0.2688 g sample of a monoprotic acid neutralizes 16.4 mL of a 0.8133 M KOH solution. Calculate the molar mass of the acid.

10 – A 10.0 mL solution of 0.300 M ammonia is titrated with 0.100 M HCl solution. Calculate the pH aft ether following additions of HCl:a) 10.0 mLb) 30.0 mLc) 40.0 mL

11 – Calculate the concentration of I- ions in a solution of AgI with [Ag+] = 9.1 x 10-9 M.

12 – A solution of 0.060 M NaF (75 mL) is mixed with 0.15 M Sr(NO3)2 (25 mL). Calculate the concentrations of each ion after equilibrium is achieved given Ksp for SrF2 = 2.0 x 10-10.Hint: The ion exchange reaction to produce SrF2 can be considered to go to completion before equilibrium is reestablished starting from the products, much as we’ve done for titration calculations at the equivalence point.13 – a) Calculate the molar solubility of hydroxyapatite given Ksp = 2 x 10-59.b) Calculate the molar solubility of hydroxyapatite in a buffered solution of pH 4.0.You’ll need to find the formula for hydroxyapatite and its solvation reaction in order to write the equilibrium constant expression.

Answer 1

Soluhion 4 Factors are Ca The audit of H-Ainsce asas ahen ue fran lelt to sugat a dewnti faxiad and A-F N-H 4-4 Auidity increase H-BY audiby ofH- A reases when A An electudn wlh The is The dhe inureases wlhen base A s Resonawse stabi lized The audily op H-A inreaes a A inlereser danaites PHlay PH: loy 1-4 K10-3) 19 3-014 PH+paH t

Now OHOr 114 29x10-12 So HO Kaz 13x l0-1 pkaz log (Ka) 131010) olog 3 9.89 10-0 1 एकেहानी क PHI(99-04)) 2 pH? 5175 AC HA H + 4 Ca -Ca -Cd Kaz CaCad) C(l-a) ell-a) Ka Ca

Se Kae Ca Ka Cx(0025) 5X10-5 OY 4.5x 10-5 200X l0- 5 '02 M