Which one of the following aqueous solutions has the lowest [OH]?
A. pure water
B. 1 × 10-4 M solution of NaOH
C. a solution with a pOH of 2.0
D. a solution with a pH of 8.0
E. 1 × 10-3 M solution of NH3
Which one of the following aqueous solutions has the lowest [OH]? A. pure water B. 1...
1 ) Using the data in the table below, which conjugate acid is the weakest acid, given that all solutions (aq., 25 °C) are 0.200 M? Explain your choice! Base Kb CIO 3.3 x 10-7 CO3-2 1.8 x 10-4 HS- 1.8 x 10-7 NH2CH3 4.4 x 10-4 1b) Which of the following aqueous solutions has the lowest [OH-] (aq., 25 °C)? A) a solution with a pH of 3.0 B) a 1 x 10-4 M solution of HNO3 C) a...
Which of the following aqueous solutions has the lowest freezing point? The Kf of water is 1.86 kg.oC/mol. a. 0.8 m CH3OH (methanol) b. 0.4 m NaCl c. 0.3 m MgBr2 d. 0.2 m AlF3 e. 0.25 m Ca(NO3)2 Calculate the freezing point ONLY for the solution you marked as your answer above.
9) Which one of the following pairs cannot be mixed together to form a buffer solutions A) KOH, HNO2 B) H2S03. KHSO3 C) HONH2, HONH3CI D) NaCI, HCI E) RbOH, HF 10) The Henderson-Hasselbalch equation is acid) acid] A) pH- pKa log basel base] D) pH - pKaobase [acid 11) HA is a weak acid. Which equilibrium corresponds to the equilibrium constant Kp for A- A) A (aq) H30+ (aq) HA (aq) H20 0) B) HA (aq) + OH-(aq) 근...
Which of the following 0.1M aqueous solutions has the lowest pH at 25 C? A. K2HPO3 B. K2PO3 C. NaH2PO3 D. Li3PO3 E. NaOH (the answer is C, but can someone explain why)
1) Which ONE of the following aqueous solutions contains the lowest concentration of cations, assuming 100% dissolution and ionization? (A) 0.5 M sodium phosphate (B) 1.0 M potassium nitrate (C) 2.0 M magnesium sulfate (D) 0.75 M calcium chloride (E) 1.5 M hydrogen chloride 2) The highest mass of SnS will dissolve in 1.0 L of an aqueous solution of: (A) 0.1 M MgS (B) 0.1 M (NH4)2S (C) 0.1 M Sn(NO3)2 (D) 0.1 M Na2S (E) 0.1 M CaCl2
Listed below you will find concentration information about several aqueous acid-base solutions at 25°C. Match each acid base solution with the correct pH or POH - 0.78 M HCl(aq) 1.pOH = 8.28 . [H30+) = 1.7 * 10-5 M 2.pH = 13.48 .. [H30+1 -2.0 * 10-4 M 3.pH = 0.11 • 0.30 M NaOH(aq) 4. pOH = 10,30 [OH-] = 5.3 * 10-9M 5. pH = 4.77
A. Answer the following questions considering the 4 aqueous solutions below. Each contains 100.0 mL of the following solutions: Solution A = 0.10 M HBr Solution B = 0.10 M HNO2 Solution C = 0.10 M NaOH Solution D = 0.10 M NH3 Fill in the blanks with GT (greater than), ET (for less than) or EQ (for equal to). 1. ________ pH of A pH of B. 2. ________ pH of B ____________ 1. 3. ________ pH of C...
Version 2 sider the phase diagram of an aqueous solution and that for pure water. Which of the following statements are true? A) The line representing freezing for the solution phase diagram is shifted to the left / of that for pure water. (B) The line representing freezing for the solution phase diagram is shifted to the right of that for pure water. C) The line representing boiling for the solution phase diagram is shifted to the left of that...
For each of the following strong base solutions, determine [OH−],[H3O+], pH, and pOH. A) 8.75*10^-3 M LiOH: [OH-] & [H3O+] B) pH & pOH C) 1.13*10^-2 M Ba(OH)2: [OH-] & [H3O+] D) pH & pOH E) 2.0*10^-4 M KOH: [OH-] & [H3O+] F) pH & pOH G) 5.1*10^-4 M Ca(OH)2 H) pH & pOH
Calculate the hydroxide ion concentration and the POH in an aqueous solution with a pH = 2.3 at 25°C. a. [OH 1 - 2.0 * 10-12M : POH - 2.30 b. [OH 7 -2.0 * 10-11M: POH = 11.70 C[OH 7 -5.0 x 10-3 M : POH = 11.70 d. [OH ) - 2.0 x 10-12 M : POH = 11.70 e.[OH ) - 2.0*10-12M : POH -8.50 Which of the following solutions is a good buffer system? a. A...