Please answer clearly and correctly.Show your original work!!!
Will rate!
a) CH3CH2COOH + H2O -----------------------> CH3CH2COO- + H3O+
acid base conjugate base conjugate acid
CH3CH2COOH and CH3CH2COO- is one conjugate acid-base pair.
b) propanoic acid is a weak acid
the pH of weak acid is given by
pH = 1/2[pKa -log C]
Given pH = 2.79
C = 0.20M
Then
2.79 = 1/2 [ pKa -log0.20]
solvin g pKa = 4.881
Ka = 10-4.881 = 1.315x10-5
c)
i)CH3CH2COOH + NaOH -----------------------> CH3CH2COONa + H2O
50x0.2 50x0.2 0 0 initial mmoles
0 0 50x0.2 -- after rxn
The solution has a salt of weak acid and strong base, so will be basic in solution with pH >7.
FALSE.
ii) HCl is a strong acid dissociates completely but popanoic acid is weak dissociates to small extent,
Thus [H3O+} from HCl is much higher than from propanoic acid of same concentration.
Thus if both have to have same pH ,that is same [H3O+] the concentration of weak acid should be much less , so that the degree of dissociation is equal to 1 .
FAlse.
d)
For titration
mmoles of acid = mmoles of base
V1M1 = V2M2
25.00mL x M1 = 0.173 x 20.52
M1 = 0.142 M
Please answer clearly and correctly.Show your original work!!! Will rate! CH,CH,COOH(aq) + H2O(1) = CH3CH2COO(aq) +...
4. Consider a 200 mL solution of 0.40 M CH COOH (aq) at 25'C a. What is the pH if you titrate in 100 mL of 0.20 M NaOH? b. How many mL of 0.20 M NaOH will it take to reach the equivalence point c. What is the pH at aforementioned equivalence point?
Consider the following reaction: CH COOH(aOH (aq) > CH COo (aq)+H2O(I) 1st attempt m# See Periodic Table See Hint How much 6.01 M NaOH must be added to 410.0 mL of a buffer that is 0.0205 M acetic acid and O.0230 M sodium acetate to raise the pH to 5.75? mL
HC2H2O2 (aq) + NaOH(aq) + NaC2H2O2 (aq) + H2O(1) Trial Vi (mL) V (mL) 3.79 14.14 1 2 3 For their first trial, a student pipettes 5.00 mL of a vinegar solution into an Erlenmeyer flask. The student titrates the vinegar with standardized NaOH with a molarity of 0.386 M. The volume of titrant used was recorded in the table above. Calculate the molarity of the vinegar solution for this trial. Enter a number without units.
Question 1 1 pts HC2H2O2 (aq) + NaOH(aq) - NaC2H302 (aq) + H2O(1) Trial V;(mL) V (mL) 13.82 1 3.54 2 3 For their first trial, a student pipettes 5.00 mL of a vinegar solution into an Erlenmeyer flask. The student titrates the vinegar with standardized NaOH with a molarity of 0.229 M. The volume of titrant used was recorded in the table above. Calculate the molarity of the vinegar solution for this trial. Enter a number without units.
1) NaOH(aq) + HCl(aq) - NaCl(aq) + H2O(1) To determine the concentration of a NaOH(aq) solution, a student titrated a 50. mL sample with 0.10 M HCl(aq). The reaction is represented by the equation above. The titration is monitored using a pH meter, and the experimental results are plotted in the graph below. 13. 0S 7.04 Answer Key on School Loop @ P 1.07. 0 25.0 50.0 Volume HCI added (mL) One student titrated the NaOH(aq) with 1.0 M HCl(aq)...
4. 25.0 mL sample of 0.10 M CH COOH is titrated with 0.12 M NaOH. Determine the pH of the solution a) Before the addition of the base. The Ka of CH COOH is 1.8 x 10-5. (10 points) b) After the addition of 15.0 mL of NaOH. The Ka of CH,COOH is 1.8 x 10-5. (10 points)
please show all work neatly 5. (2 pts) Consider the following acids and their dissociation constants HPO4-2(aq) + H2O.. H3O"(aq) + PO4-3(aq) Ka-2.2x 10.13 HCOOH(aq) H20 H3O (a) HCOO (aq) Ka = 1.8x10-4 a. Which is the weaker acid, HPO42 or HCOOH? b. What is the conjugate base of, HPO42 or c. Which acid has the weaker conjugate base? d. Which acid produces more ions? 6. (2 pts) Write a balanced equation for the neutralization of H3PO4(aq) and NaOH(aq) (3...
A 35.0-ml sample of 0 150 Macetic acid (CH,COOH) is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added. Part A O mL Express your answer using two decimal places. KALOOB ? pH Submit Request Answer Part B 17.5 ml. Express your answer using two decimal places EVO AZOO pl Subrni an
Calculations The following calculations are necessary to complete your Report Sheet. Consult the table on page 119 for appropriate K and K, values. Complete these calculations on your Report Sheet for complete credit. I. pH of Strong and Weak Acids 1. Calculate the pH of a 0.10 M hydrochloric acid solution, HCl(aq). 2. Calculate the pH of a solution prepared by diluting 5.00 mL of 0.10 M hydrochloric acid, HCl (aq), in enough water to make a 50.0 mL solution....
This FRQ is kinda confusing me, could someone help me please :) 127.Hypochlorous acid, HOCI, is a weak acid in water. The K, expression for HOCI is shown above Write a chemical equation showing how HOCI behaves as an acid in water a. Calculate the pH ofa 0.175 M solution of HOCI b. Write the net ionic equation for the reaction between the weak acid HOCI(aq) and the strong base NaOH(aq) In an experiment, 20.00 mL of 0.175 M HOCI(aq)...