Homework Answers
ANSWER:
Oxalic acid is (COOH)2 i.e. it is of form H2A.
So in chart, we be supposed to look at green colour curve.
SO, from graph, for absorption of 10^-2 M , we can say pH<2 but we cant articulate exact valure.
As a good rough calculation, we canister say pH=1 Sodium oxalate is Na2C2O4
i.e., it is of figure A-2. So,in graph,l we should appear at Purple dashed curve. .
SO, from graph, for attention of 10^-2 M , we can see pH value can be several value >5 as at that point bend is a straight line corresponding to x axis.
So, pH container have any value amid 5 and 14
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READING pH from Diagrams If you have an oxalic acid concentration of 10-2 M, what is...
Calculate the pH of 1.00 x 10^-2 M oxalic acid solution. Calculate the pH of 1...
Calculate the pH of 1.00 x 10^-2 M oxalic acid solution. Calculate the pH of 1 x 10^-2 M solution of sodium oxalate. Ka1 = 5.62 x 10^-2, Ka2 = 5.42 x 10^-5
What is the hydroxide-ion concentration of a 0.190 M sodium oxalate (Na2C2O4) solution? For oxalic acid...
What is the hydroxide-ion concentration of a 0.190 M sodium oxalate (Na2C2O4) solution? For oxalic acid (H2C204), Kal = 5.6 x 10-2 and K42-5.1 x 10-5. 6.1 x 10-6M o 1.0 x 10-7 M 7.9 x 10-2 M O 3.1 x 10-3 M O 1.8 x 10-7M
9) What is the H+ ion concentration in a 4.8 x 10–2 M KOH solution? A)...
9) What is the H+ ion concentration in a 4.8 x 10–2 M KOH solution? A) 4.8 x 10–2 M B) 1.0x 10–7 M C) 2.1 x10–13 M D) 4.8 x 10–11 M 10) HA is a weak acid. Which equilibrium corresponds to the equilibrium constant Kb for A-? A) HA (aq) + H2O (l) H2A+ (aq) + OH-(aq) B) A- (aq) + H3O+ (aq) C) HA (aq) + OH- (aq) H2O (l) + H+ (aq) HA (aq) + H2O...
Nonlinear. Here we want you to verify this property by computing the output of S, for the followi...
nonlinear. Here we want you to verify this property by computing the output of S, for the following two pairs of inputs. The S-box S is given as follows: 0-6. (10 points) One important property which makes DES secure is that the S-Boxes are S-box S S0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 14 04 13 01 02 15 11 08 03 10 06 12 05 09 00 07 1...
Data Table 1 Solution A.05M Acetic Acid IA (aq) + 1,0 (1) PH : 2.90 1,0'...
Data Table 1 Solution A.05M Acetic Acid IA (aq) + 1,0 (1) PH : 2.90 1,0' (aq) + (aq) 15 Molarity - Initial Concentration Change quilibrium Concentration 05-x K = [H,01[A] = [x][x] [HA] [.05-x] % ionization = [H0+1*100 [HA Jinitial = [x] * 100 .05 Data Table 2 Solution B 0.025M Acetic Acid PH: 3.00 IA (aq) + 10 (1) 1:0 (aq) + (aq) 1.025 Tolarity - Initial Concentration Change Equilibrium Concentration 1.025-X K = [x][x] [0.025-x] % ionization...
3. a. What concentration of acetic acid will have a pH of 2.50? pKa = 4.76...
3. a. What concentration of acetic acid will have a pH of 2.50? pKa = 4.76 b. What concentration of oxalic acid, shown below, will have a pH of 2.50? pKa1 = 1.25, pKa2 = 4.14 c. One way oxalic acid can be produced in fungi is by hydrolysis of oxaloacetate, an intermediate in the Kreb’s citric acid cycle, to produce oxalic acid and acetic acid. This reaction, shown below, is catalyzed by oxaloacetase. [O2CC(O)CH2CO2] 2− + H2O → C2O2−...
(10 pts) The graph below shows solubility vs. pH for five solids (where solubility in M...
(10 pts) The graph below shows solubility vs.
pH for five solids (where solubility in M is the same as the
dissolved metal cations). These solids are hydroxides of chromium
(Cr), aluminum (Al), nickel (Ni), and iron (Fe in II and III
oxidation states; often referred to as ferrous and ferric iron).
Use this graph to answer parts a-c below.
a) Which solid is among the least soluble at pH 12 and among
the most soluble at pH 6?
b)...
- What is a primary standard? You have weighed out precisely 2.471 g of oxalic acid...
- What is a primary standard? You have weighed out precisely 2.471 g of oxalic acid dihydrate, and diluted it to 250,0 mL. What is its molarity? (Hint: Example 12.1) What is a secondary standard? You have diluted 9 mL of roughly 6 M NaOH to 500 mL. What is the approximate molarity of the base? (Pay attention to significant figures) (Hint: Example 12.2) What is the name of the indicator you are to use and what color does it...
5-10 molar concentration of NaOH solution is 0. 128 B. Molar Concentration of an Acid Solution Acid type HA HA H...
5-10
molar concentration of NaOH solution is 0. 128
B. Molar Concentration of an Acid Solution Acid type HA HA HA Unknown No. Balanced equation for beutralization of acid with NaOH. 25.0 25.0 25.0 1. Volume of acid solution (m) 2 Buret reading of NaOH, initial (L.) 3. Buret reading of NaOH,final (mL) 4. Volume of NaOH dispensed (m) 5. Molar concentration of NaOH (MOVL). Part A 6. Moles of NaOH dispensed (mol) 7. Molar concentration of acid solution (mol/L)...
5. What is the pH of a solution with a OH concentration of 2.52 x 10'M?...
5. What is the pH of a solution with a OH concentration of 2.52 x 10'M? Is this solution acidic, basic, or neutral? Show the steps in your calculation. Answer 6. What is the pH of a solution with a H2O* concentration of 2.7 x 10 M? Is this solution acidic, basic, or neutral? Show the steps in your calculation. Answer 7. What is the pH of a solution with a OH concentration of 5.53 x 10-M? Is this solution...
What is the hydroxide-ion concentration of a 0.190 M sodium oxalate (Na2C2O4) solution? For oxalic acid (H2C204), Kal = 5.6 x 10-2 and K42-5.1 x 10-5. 6.1 x 10-6M o 1.0 x 10-7 M 7.9 x 10-2 M O 3.1 x 10-3 M O 1.8 x 10-7M
nonlinear. Here we want you to verify this property by computing the output of S, for the following two pairs of inputs. The S-box S is given as follows: 0-6. (10 points) One important property which makes DES secure is that the S-Boxes are S-box S S0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 14 04 13 01 02 15 11 08 03 10 06 12 05 09 00 07 1...
Data Table 1 Solution A.05M Acetic Acid IA (aq) + 1,0 (1) PH : 2.90 1,0' (aq) + (aq) 15 Molarity - Initial Concentration Change quilibrium Concentration 05-x K = [H,01[A] = [x][x] [HA] [.05-x] % ionization = [H0+1*100 [HA Jinitial = [x] * 100 .05 Data Table 2 Solution B 0.025M Acetic Acid PH: 3.00 IA (aq) + 10 (1) 1:0 (aq) + (aq) 1.025 Tolarity - Initial Concentration Change Equilibrium Concentration 1.025-X K = [x][x] [0.025-x] % ionization...
(10 pts) The graph below shows solubility vs.
pH for five solids (where solubility in M is the same as the
dissolved metal cations). These solids are hydroxides of chromium
(Cr), aluminum (Al), nickel (Ni), and iron (Fe in II and III
oxidation states; often referred to as ferrous and ferric iron).
Use this graph to answer parts a-c below.
a) Which solid is among the least soluble at pH 12 and among
the most soluble at pH 6?
b)...
- What is a primary standard? You have weighed out precisely 2.471 g of oxalic acid dihydrate, and diluted it to 250,0 mL. What is its molarity? (Hint: Example 12.1) What is a secondary standard? You have diluted 9 mL of roughly 6 M NaOH to 500 mL. What is the approximate molarity of the base? (Pay attention to significant figures) (Hint: Example 12.2) What is the name of the indicator you are to use and what color does it...
5-10
molar concentration of NaOH solution is 0. 128
B. Molar Concentration of an Acid Solution Acid type HA HA HA Unknown No. Balanced equation for beutralization of acid with NaOH. 25.0 25.0 25.0 1. Volume of acid solution (m) 2 Buret reading of NaOH, initial (L.) 3. Buret reading of NaOH,final (mL) 4. Volume of NaOH dispensed (m) 5. Molar concentration of NaOH (MOVL). Part A 6. Moles of NaOH dispensed (mol) 7. Molar concentration of acid solution (mol/L)...
5. What is the pH of a solution with a OH concentration of 2.52 x 10'M? Is this solution acidic, basic, or neutral? Show the steps in your calculation. Answer 6. What is the pH of a solution with a H2O* concentration of 2.7 x 10 M? Is this solution acidic, basic, or neutral? Show the steps in your calculation. Answer 7. What is the pH of a solution with a OH concentration of 5.53 x 10-M? Is this solution...
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