Question

In: Chemistry

Identify the single most acidic or basic principle species in each of the following solutions. Calculate...

Identify the single most acidic or basic principle species in each of the following solutions. Calculate its molarity or number of moles (your choice). In the case of any species other than H3O+ or OH-, write the net ionic equation for the reaction of that speicies with water. Calculate the pH of each solution.

a) 10.0 mL of 0.30 M HCL

b) 10.0 mL of 0.35 M HF

c) 10.0 mL of 0.25 KOH

d) 15.0 mL of 0.30 M NaOH

e) 15.0 mL of 0.20 M NH3

Solutions

Expert Solution

a) 10.0 mL of 0.30 M HCL

    no of moles of HCl = molarity * volume in L

                                   = 0.3*0.01 = 0.003 moles

HCl --------> H+ + Cl-

0.3M                0.3M

[OH-]   = Kw/[H+]

             = 1*10-14/0.3 = 3.3*10-14 M

PH   = -log[H+]

         = -log0.3 = 0.5228

b) 10.0 mL of 0.35 M HF

no of moles of HF = 0.35* 0.01 = 0.0035moles

HF --------> H+ + F-

c) 10.0 mL of 0.25 KOH

no of moles of KOH = 0.25* 0.01 = 0.0025moles

   KOH ------> K+ + OH-

0.25 M                     0.25M

{H+}   = Kw/[OH-]

            = 1*10-14/0.25    = 4*10-14 M

PH   = -log4*10-14    = 13.3979

d) 15.0 mL of 0.30 M NaOH

    no of moles of NaOH = 0.3* 0.015 = 0.0045 moles

NaOH --------> Na+ + OH-

0.3                               0.3

[H+]   = Kw/[OH-]

           = 1*10-14/0.3   = 3.33*10-14 M

PH   = -log[H+}

          -log3.33*10-14    = 13.4775

e) 15.0 mL of 0.20 M NH3

no of moles of NH3 = 0.2* 0.015 = 0.003 mole


Related Solutions

Identify solutions of the following salts as acidic, basic or neutral. Identify solutions of the following...
Identify solutions of the following salts as acidic, basic or neutral. Identify solutions of the following salts as acidic, basic or neutral. a.) NaBr b.) Ca(C2H3O2)2 c.) NH4F d.) MgHPO4 e.)C2H5NH3Cl f.) KHSO4
Predict whether the following salt solutions are neutral, acidic, or basic, and calculate the pH of...
Predict whether the following salt solutions are neutral, acidic, or basic, and calculate the pH of each. Hint: Write the equation for dissociation of the salt and any equilibrium established. 0.25 M NH4Br; KB of NH3 = 1.8×10−5 0.10 M NaCN; KA of HCN = 4.9×10−10 0.20 M NaNO2; KA of HNO2 = 4.6×10−4
Calculate the [H+] in each of the following solutions and indicate whether the solution is acidic...
Calculate the [H+] in each of the following solutions and indicate whether the solution is acidic or basic? a) [OH-] = 2.32 X 10^-4 M b)[OH-] = 8.99 x 10^-10 M c) [OH-] = 4.34 x 10^-6 M d) [OH-] = 6.22 x 10^-12 M
State whether 0.1 M solutions of each of the following salts are acidic, basic, or neutral....
State whether 0.1 M solutions of each of the following salts are acidic, basic, or neutral. explain your reasoning for each by writing a balanced net ionic equation to describe the behavior of each non-neutral salt in water: NaCN, KNO3, NH4Cl, NaHCO3, and Na3PO4
Classify the following each of the 0.10 M solutions as either acidic, basic, or neutral. Show...
Classify the following each of the 0.10 M solutions as either acidic, basic, or neutral. Show equations and determine/calculate the pH of each solution. You may need Ka or Kb of original acid or base and Kw value to perform each substance. a) NaCl b) NH4Cl c) KNO2 d) NaF e) KNO3 f) NH4NO3 g) KC2H3O2
Identify the basic assumption or broad accounting principle that was violated in each of the following...
Identify the basic assumption or broad accounting principle that was violated in each of the following situations. 1. Pastel Paint Company purchased land two years ago at a price of $250,000 Because the value of the land has appreciated to $400,000 the company has valued the land at$400,000 in it's most recent balance sheet.   2. Atwell Corp has not prepared financial statements for external users for over three years 3. The Klingon Company sells farm machinery Revenue from a large...
Indicate if the aqueous solutions of the following salts would be acidic, basic, neutral, or “need...
Indicate if the aqueous solutions of the following salts would be acidic, basic, neutral, or “need more information”. LiNO3 (C5H5NH)(CH3COO) LiOCN (CH3NH3)Cl RbClO4 NH4I
Indicate if the aqueous solutions of the following salts would be acidic, basic, neutral, or “need...
Indicate if the aqueous solutions of the following salts would be acidic, basic, neutral, or “need more information”. LiNO3 (C5H5NH)(CH3COO) LiOCN (CH3NH3)Cl RbClO4 NH4I
#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions? a. NaF...
#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions? a. NaF b. RbCl c. Sn(NO3) d. MgS e. CrI3 #1 B) Acid/base strength a. Put these in order of increasing basicity CO3-2, I-, NH2-, HSO4-, OH-, NO3- b. Put these in order of increasing acidity HI, NH3, HCO3-, HF, H2O, HClO4
Why iron(III) solutions are more soluble in acidic solutions using Le Chatalier's principle?
Why iron(III) solutions are more soluble in acidic solutions using Le Chatalier's principle?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT