![-10. You have a 250-mL sample of 1.250 M acetic acid (K-1.8 × 10 s). Assuming no volume change, how much NaOH must be added to make the best buffer? A) 6.25 g B) 12.5 g C) 16.3 g D) 21.3 g E) none of these A solution contains 0.500 M HA (Ka-1.0 × 10-8) and 0.432 M NaA. what is the [H+] after 0.10 mole of HCl is added to 1.00 L of this solution? 11. a) 1.0 × 10-8M b) 3.0 × 10-8M c) 5.5x 1021 M d) 1.8 x 10-8M e) none of these 12· The concentration of OH in a saturated solution of Mg(OH)2 is 363 x 10-4 M. The Ksp of Mg(Oh i A) 6.6 x 10B) 4.8 x 10 C) 1.3x 10 D) 3.6 x 10 E) 2.4 x 10-1](http://img.homeworklib.com/questions/c487a710-b640-11eb-92f1-c738fa294544.png?x-oss-process=image/resize,w_560)
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You have a 250.-mL sample of 1.250 M acetic...
I need full explanation, please! A solution of Pb(NO_3)_2 is added to a second solution in...
I need full explanation, please!
A solution of Pb(NO_3)_2 is added to a second solution in which [Cl^-] = [F^-] = [I^-] = [SO_4^2-] = 0.001 M. What is the first precipitate that forms? A) PbI_2 (K_sp = 8.5 times 10^-9) B) PbSO_4 (K_sp= 1.8 times 10^-8) C) PbCl_2 (K_sp = 1.5 times10^-5) D) PbF_2 (K_sp = 3.7 times 10^-8)
Please help me with 6a calculations Experimental Procedure, Part A.6 versus Part B.2. Would you expect more or...
Please help me with 6a calculations
Experimental Procedure, Part A.6 versus Part B.2. Would you expect more or less standard 0.05 M HCI to be used to reach the methyl orange endpoint in Part B.2? Explain. A determination of the molar solubility and the K_sp calcium hydroxide was completed according to the experimental procedure. The following data were collected for Trial 1. (See Report Sheet.) Complete the table for the determinations. Record the calculated values to the correct number of...
Help please The effect of a catalyst an on equilibrium is to _____ A) increase the...
Help please
The effect of a catalyst an on equilibrium is to _____ A) increase the rate of the forward reaction only B) increase the equilibrium constant so that products are favored C) slow the reverse reaction only D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture E) shift the equilibrium to the right Which one of the following is the weakest acid? A) HF (K_a = 6.8 times 10^-4) B) HClO...
Please explain how you arrived at the answer, the current inputs are incorrect. Consider 0.10 M...
Please explain how you arrived at the answer, the current inputs
are incorrect.
Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH. Reference the K_a and K_b Tables, and think about the ac d/base properties of each species present. C_5H_5N H_3BO_3 HONH_3I Ca(OH)_2 KNO_3 Ca(OBr)_2 HClO_4
Please answer 18 and 19! and show work What are the Bronsted-Lowry acids in the following...
Please answer 18 and 19! and
show work
What are the Bronsted-Lowry acids in the following chemical reaction? HBr(aq) + CH_3COOH (aq) CH_3C (OH)^+_2 (aq) + Br^-(aq) a) CH_3COOH, CH_3C (OH)^+_2 b) CH_3COOH, Br^- c) HBr, CH_3COOH d) HBr, CH_3C(OH)^+_2 What is the strongest acid among the following? a) H_2SO_3 b) H_2SeO_3 c) H_2SO_4 d) H_2SeO_4 What is the K_w of pure water at 50.0 degree C, if the pH is 6.630? a) There is not enough information to calculate...
explain 10,11,12 e. The answer depends on the volumes of the respective sululus. 10. A solution...
explain 10,11,12
e. The answer depends on the volumes of the respective sululus. 10. A solution has [OH]=3.0 x10-'M. The [H] in this solution is a. 1.0M b. 3.0 x 107 M c. 1.0 x 10 M d. 3.3 x 108 M e. none of these 11. Calculate the [OH) in a solution that has a pH of 3.76. a. 5.8 x 10 M b. 1.0x 10 M c. 1.7x10+ M d. 2.7 x 10-4 M e. none of these...
B. 0.20 M C. 5.0 M D. 100M 100. A 250-ml sample of a 0.250 M...
B. 0.20 M C. 5.0 M D. 100M 100. A 250-ml sample of a 0.250 M glucose solution contains how much glucose? Glucose has a molar mass of 180 g/mol A. 11,2505 B. 180 C. 2.888 D. 1123 101. A salt solution is made by adding 25.5 g of salt to 135 ml of solution. What is the [w/v) of the salt solution? A. 18.9% B. 5.29% C. 110% D. 15.9% 102. How much of a 35.0X(w/v) glucose solution would...
In which set are both compounds soluble is water? (A) magnesium (MgCI_2) and octane (C_6H_18) (B)...
In which set are both compounds soluble is water? (A) magnesium (MgCI_2) and octane (C_6H_18) (B) ethanol (CH_2CH_2OH) and propane (CH-3CH_2CH_3) (C) carbon tetrachloride (CCI_4) and magnesium chloride (MgCI_2) (D) magnesium chloride (MgCI_2) and ethanol (CH_2CH_2OH) When potassium chloride, KCI dissolves in water, which of these diagram would best what you would expect to find in solution? Which is a precipitation reaction? (A) 2Cr(s) + 6HNO_3(aq) rightarrow 2Cr(NO_3)_3(aq) + 3H_2(g) (B) H_3PO_4(aq) + 3KOH(aq) rightarrow K_3PO_4(aq) + 3H_2O(l)) (C) 3Ba(NO_3)_2(aq)...
#1. If you have 250. mL of a buffer that is 0.12 M in H2PO4- and...
#1. If you have 250. mL of a buffer that is 0.12 M in H2PO4- and 0.12 M HPO42- , what will be the pH after 27.77 mL of 0.193 M NaOH is added? Ka2 is 6.21 x 10-8 . #2. Given 1000. mL of a 0.434 M solution of C2H5NH2 (pKb = 3.19), what is the pH if 26.45 g of C2H5NH3Cl (81.5446 g/mol) are added?
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution...
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution that is 0.001 M. Repeating this 1000-fold dilution process five more times results in a concentration of A. 1.0 x 10-8 M B. 5.0 x 10-'M C. 1.0 x 10-18 M D. 1.0 x 10-12 M E. 2.0 x 10+M 19. Which of the following statements is true regarding electrolytes and nonelectrolytes? A. Molten ionic compounds are usually considered to be weak electrolytes. B....
I need full explanation, please!
A solution of Pb(NO_3)_2 is added to a second solution in which [Cl^-] = [F^-] = [I^-] = [SO_4^2-] = 0.001 M. What is the first precipitate that forms? A) PbI_2 (K_sp = 8.5 times 10^-9) B) PbSO_4 (K_sp= 1.8 times 10^-8) C) PbCl_2 (K_sp = 1.5 times10^-5) D) PbF_2 (K_sp = 3.7 times 10^-8)
Please help me with 6a calculations
Experimental Procedure, Part A.6 versus Part B.2. Would you expect more or less standard 0.05 M HCI to be used to reach the methyl orange endpoint in Part B.2? Explain. A determination of the molar solubility and the K_sp calcium hydroxide was completed according to the experimental procedure. The following data were collected for Trial 1. (See Report Sheet.) Complete the table for the determinations. Record the calculated values to the correct number of...
Help please
The effect of a catalyst an on equilibrium is to _____ A) increase the rate of the forward reaction only B) increase the equilibrium constant so that products are favored C) slow the reverse reaction only D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture E) shift the equilibrium to the right Which one of the following is the weakest acid? A) HF (K_a = 6.8 times 10^-4) B) HClO...
Please explain how you arrived at the answer, the current inputs
are incorrect.
Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH. Reference the K_a and K_b Tables, and think about the ac d/base properties of each species present. C_5H_5N H_3BO_3 HONH_3I Ca(OH)_2 KNO_3 Ca(OBr)_2 HClO_4
Please answer 18 and 19! and
show work
What are the Bronsted-Lowry acids in the following chemical reaction? HBr(aq) + CH_3COOH (aq) CH_3C (OH)^+_2 (aq) + Br^-(aq) a) CH_3COOH, CH_3C (OH)^+_2 b) CH_3COOH, Br^- c) HBr, CH_3COOH d) HBr, CH_3C(OH)^+_2 What is the strongest acid among the following? a) H_2SO_3 b) H_2SeO_3 c) H_2SO_4 d) H_2SeO_4 What is the K_w of pure water at 50.0 degree C, if the pH is 6.630? a) There is not enough information to calculate...
explain 10,11,12
e. The answer depends on the volumes of the respective sululus. 10. A solution has [OH]=3.0 x10-'M. The [H] in this solution is a. 1.0M b. 3.0 x 107 M c. 1.0 x 10 M d. 3.3 x 108 M e. none of these 11. Calculate the [OH) in a solution that has a pH of 3.76. a. 5.8 x 10 M b. 1.0x 10 M c. 1.7x10+ M d. 2.7 x 10-4 M e. none of these...
B. 0.20 M C. 5.0 M D. 100M 100. A 250-ml sample of a 0.250 M glucose solution contains how much glucose? Glucose has a molar mass of 180 g/mol A. 11,2505 B. 180 C. 2.888 D. 1123 101. A salt solution is made by adding 25.5 g of salt to 135 ml of solution. What is the [w/v) of the salt solution? A. 18.9% B. 5.29% C. 110% D. 15.9% 102. How much of a 35.0X(w/v) glucose solution would...
In which set are both compounds soluble is water? (A) magnesium (MgCI_2) and octane (C_6H_18) (B) ethanol (CH_2CH_2OH) and propane (CH-3CH_2CH_3) (C) carbon tetrachloride (CCI_4) and magnesium chloride (MgCI_2) (D) magnesium chloride (MgCI_2) and ethanol (CH_2CH_2OH) When potassium chloride, KCI dissolves in water, which of these diagram would best what you would expect to find in solution? Which is a precipitation reaction? (A) 2Cr(s) + 6HNO_3(aq) rightarrow 2Cr(NO_3)_3(aq) + 3H_2(g) (B) H_3PO_4(aq) + 3KOH(aq) rightarrow K_3PO_4(aq) + 3H_2O(l)) (C) 3Ba(NO_3)_2(aq)...
18. Diluting 1.0 mL of a 1.0 M solution to 1000 mL results in a solution that is 0.001 M. Repeating this 1000-fold dilution process five more times results in a concentration of A. 1.0 x 10-8 M B. 5.0 x 10-'M C. 1.0 x 10-18 M D. 1.0 x 10-12 M E. 2.0 x 10+M 19. Which of the following statements is true regarding electrolytes and nonelectrolytes? A. Molten ionic compounds are usually considered to be weak electrolytes. B....
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