-t Pearson Pla X Smart Pearson Pla X OSmart Pearson Pla X E MasteringChemist x emView?assignmentProblemID=142181686&offset%3Dprev CHE154-H Gen Chem II Bronikowski S20 Part B Choose an expression for the acid ionization constant (Ka) for HCHO2. [H3O*][CHO2 ] [НCНО ,] O Ka [CНО2] %3D [HCHO2] [H3O*][CHO2 ] [H2O][HCHO2] O Ka = O Ka [H3O*][HCHO2] [CНО2] %3D Submit Request Answer Part C Choose an expression for the acid ionization constant (Ka) for HF.

-t Pearson Pla X Smart Pearson Pla X OSmart Pearson Pla X E MasteringChemist x emView?assignmentProblemID=142181686&offset%3Dprev CHE154-H Gen Chem II Bronikowski S20 Part B Choose an expression for the acid ionization constant (Ka) for HCHO2. [H3O][CHO2 ] [НCНО ,] O Ka [CНО2] %3D [HCHO2] [H3O][CHO2 ] [H2O][HCHO2] O Ka = O Ka [H3O*][HCHO2] [CНО2] %3D Submit Request Answer Part C Choose an expression for the acid ionization constant (Ka) for HF.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The Kb for the weak base B is 7.33 x 10-7. Calculate the Ka for conjugate acid BH* at 25°C. Report your answer in scientific notation with two places past the decimal. Use this format for scientific notation: 1.23*10^-1 Type your answer....
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Question 1 Identify the conjugate base of HPO, in the reaction HCO, +HPO4 H,CO, + PO, Identify the conjugate base of HPO, O PO4^3- O H20 O HCO3^-1 TMTH2C03 No new data to save. Last ch
HC2HO3 (aq) _ H2O (l) <--> H3O+ (aq_ + C2HO3- (aq) pKa =3.18 at 25C The equilibrium for the acid ionization of HC2HO3 is represented by the equation above. If 10.0 mL of 0.20 M HC2HO3 react with 5.0 mL of 0.10M NaOH, how could you calculate the pH of the resulting solution?
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Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. acid B C Ka M 0 7.28 x 10 pK 1.17 11.3 0 relative strength (Choose one) ✓ (Choose one) ✓ (Choose one) ✓ O *10 X ?
Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. K. pk a acid relative strength x10 А 9.036 (Choose one) ? 6- 2.6 x 10 (Choose one) - 12 4. X 10 C (Choose one) B.
Successive approximation method To determine [H3O+] in 0.00250 M HNO2(aq) (Ka = 4.5. × 10-4), the first equation we [H;O*] is If we assume that x is very small compared to 0.00250, the first iteration gives x = (0.00250 × 4.5 × 10-4)/2 = 0.00106. Even though the assumption is not valid, it seems likely that (HNO2] is closer to (0.00250 – 0.00106) M than to 0.00250 M. Substitute the new value into the original equation to obtain the second iteration, would obtain in solving for x = [H3O*][NO2¯] [HNO2] Ка 0.00250-r = 4.5 × 10-4 0.00250-0.00106 Normally when x < 5% Minitial, we solve this equation using the quadratic formula. This tutorial will lead you through an alternative method called successive approximations. and then x = 8.04 × 10–4. Now, we can restrict x to the following range: 8.04 x 10¬4 < x< 1.06 × 10–3 Use the new value of x to write that [HNO2] = (0.00250 – 0.000804) M and solve the equation once again for x to obtain the third iteration, 4.5 × 10–4 0.00250-0.000804 which…
Extra credit. Which of the following approximate pKa ranges for the following acids is correct? You don't need a calculator (i.e., between 3 and 4, between 9 and 10 etc. There may be more than one correct answer. HNO2 Ka = 4.0 x 10-4 pKa between 3 and 4 HCO3- Ka = 6.3 x 10-11 pKa between 10 and 11 HCO2H Ka = 2.0 x 10-4 pKa between 3 and 4 HCN Ka = 7.9 x 10-10 pKa between 8 and 9
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Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. acid A B C Ka 4.29 X 10 1.58 × 10 -7 - 11 9.12 × 10 -3 pKa 6.37 10.8 2.04 relative strength 2 3 (weakest) 1 (strong ↑ x10 Be Careful Please check the number of significant digits in your answer. OK