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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...
The concentration of hydronium is 3.0 x 10-5 M, what is the POH? HTML Editora BI y A - A - IX E 25 xX, EE Vaba aeg TT 12pt Paragraph O words Question 2 4 pts The concentration of hydroxide is 2.0 x 10-9 M, what us the pH? HTML Editor B 1 0 A A = = = = = x x = = VVDT 12pt Paragraph O words Question 3 4 pts If the concentration of (H+)...
Suppose a solution is made containing 7.3 x 10-3 M Sr(NO3)2(aq) and 8.3 x 102 M NaF (aq). Calculate Q and determine whether a precipitate of SrF2 (s) will form. (In other words, which of the following is entirely correct?) Ksp of SrF2 = 2.8 x 10-9 a. Q = 5.0 x 105, ppt forms b. Q = 5.0 x 10-5, no ppt c. Q = 2.0 x 104 ppt forms d. Q = 6.1 x 104.ppt forms e. Q...
An unknown salt, M2Z, has a Ksp of 3.3 x 10-9. Calculate the solubility in mol/L of M2Z. a. 2.9 x 10-5 M b. 5.7 x 10-5 M c. 9.4 x 10-5 M d. 3.7 x 10-5 M
What is the H O concentration in 7.1 x 10 7.2x 10-17 M b. 1.4 x 10-12 M c. 2.9 x 103M 10. M NaOH(aq) at 25 °C? (Kw 1.01 x 104) а. d. 12 M 7.0 x 10" M е.
An electron gun creates a beam of electrons moving horizontally with a speed of 3.3 x 10' m/s. The electrons enter a 2.0-cm-long gap between two parallel, horizontal electrodes where the electric field is E = 5.0 x 104 N/C. In what direction and by what angle is the electron beam deflected by these electrodes?
Given an aqueous solution in which the [H*] =2.0 x 10-5M.what is the molar hydroxide ion concentration? A) [OH') = 2.0 x 10°M B) (OH) - 2.0x10-10M C) (OH) - 5,0 x 10M D) (OH) - 5.0 x 10M E) (OH) = 5.0 x 10-10M
200.0 mL of each of the following are mixed together: 5.0 x 10-3 M NaF, 2.0 x 10-5 M Ca(NO3)2 and 3.0 x 10-3 M Pb(NO3)2. Which of the following is true? Ksp of CaF2 is 3.9 x 10-11 and for PbF2, 3.7 x 10-8. a. only PbF2 b. both CaF2 and PbF2 c. neither CaF2 nor PbF2 d. only CaF2
What is the [H3O+] for a solution at 25°C that has pOH = 5.640? A. 2.34 x 10-4 M B. 2.29 x 10-6 M C. 4.37 x 10-9 M D. 4.27 x 10-11 M E. 8.360 M
Incorrect Question 3 0/1 pts A charged puck (with charge-5.0 x 10-4 C and mass 2.0 kg) is placed on a table in a region with a uniform electric field. The puck accelerates at 5.0 m/s2 to the right. If the friction force which the table exerts on the puck is 2.0 N (left), what is the electric field (magnitude and direction)? 20,000 N/C, left 24,000 N/C, left 24,000 N/C, right 20,000 N/C, right 16,000 N/C, right