Circle one best answer for each multiple. (4 pt. each) 1. The pH of 2.OM HCl...
Circle one best answer for each multiple. (4 pt. each) 1. The pH of 2.OM HCl is a) 2.0, b) 1.0, c) 0.0, d) <0.0. 2. Thymol blue appears red below pH 1.0, yellow between PH 2.5 - 8.0, and blue above pH 9.5. An aqueous solution turns green upon adding one drop of thymol blue. The pH of this solution is a) 0.5, b) 7, c) 9, d) 11. 3. The buffer HF/F can be prepared by mixing a)...
please answer all question show work number 7 only please The pH of 2.0M HCI is a) 2.0, b) 1.0, c) 0.0, d)<0.0. 1. 2. Thymol blue appears red below pH 1.0, yellow between pH 2.5-8.0, and blue above pH 9.5. An aqueous solution turns green upon adding one drop of thymol blue. The pH of this solution is a) 0.5, b) 7, c) 9, d) 11. The buffer HF/F can' be prepared by mixing a) HF and NaF, b)...
need help asap please Use the acid/base dissociation constants on the back page of this worksheet Which of the following mixtures result in the formation of a buffer when 1.0 L of each of the following solutions are mixed? 1. a. 1.0 M NaOH and 2.0 M CH3COOH b. 1.0 M NaOH and 2.0 M NH3 c. 1.0 M HCl and 2.0 M HCN d. 1.0 M HNOs and 2.0 M NaF e. 1.0 M NaOH and 1.0 M H2CO3...
1x10ⓇM B 2x10 M 40 Normal gastric juice has a pH of about 2 and the gastric in is the concentration of HCl in the stomach? U10 M D 3x10 M of about 2 and the gastric juice is aqueous HCI. What 2 M HCI B 1.0x10' M HCI C 0.01 M HCI D 0.14 M HCI Ques. to, 41 Question What is the [H30'] of a sweat sample that has a pH = 5.8? A 2x10mm B3X10ⓇM 3x107M 42...
What is the pH of a buffer solution containing 0.13 M HF and 5.0×10−2 M NaF? What is the pH of a buffer solution containing 1.0×10−2 M HF and 0.16 M NaF? Using the table given below for Ka values, compare the pH of an HF buffer that contains 0.13 MHF and 5.0x10-2 M NaF with another HF buffer that contains 1.0x10-2 MHF and 0.16 M NaF. Ka and K b values for selected weak acids and bases HF Acid...
the effective pH range of the KF/HF (Ka=6.8x10^-4) buffer is? a) 2.2-4.2 b)1.2-4.2 c) 2.2-5.2 d) all possible
2. (4 points) Multiple choice. Circle the best answer. In anion exchange chromatography, the charge on the column is We would expect a protein with ___ to bind most tightly to this column. a) positive, pH < PI b) positive , pH = pi c) positive , pH > pl d) negative , pH < PI e) negative , pH = PI f) negative , pH > PI
4. What is the value (M) of [H3O+] of a solution with pH = 2.0 ? State the given and needed quantities, write the proper equation. Substitute values into the equation and calculate. 5. Which of the following could be a buffer? In general what is the function of a buffer? Explain with a second example. A) NaF(aq) B) HF(aq) + NaF(aq) C) HF(aq) + O(l) D) NaF(aq) + O(l) E) NaCl(aq) + HF(aq)
f) (6 pts) Which of the following mixtures will make a buffer? (Circle only one!) r? Circle onlyone f)(6 1000 mL fh following mix oc m will make a b S a) 100 mL of 1.0 M HCI +100 mL of 1.0 M NaOH +100 mL of 0.50 M HF 100 mL of 1.0 M HCI c)100 mL of 1.0 M HF +100 mL of 0.50 M NaOH 100 mL of 1.0 M HF +100 mL of 1.0 M NaOH...
1. Calculate the equilibrium concentrations of all species present and the pH of a solution obtained by adding 0.100 moles of solid NaOH to 1.00 L of 15.0 M NH3. Kb = 1.8 × 10–5 2. One mole of a weak acid HA was dissolved in 2.0 L of water. After the system had come to equilibrium, the concentration of HA was found to be 0.45 M. Calculate the Ka for this weak acid. 3. Calculate the pH of a...