8. What is the pH of a weak acid with [HA] = 0.125 mol/L and Ka = 5.4×107? 9. A buffer is created by adding 0.35 mol of sodium benzoate to 1.00 L of a 0.40 mol/L benzoic acid solution. The Ka of benzoic acid is 6.3×105. Determine the pH of the buffer. 10. 15.0 mL of 0.250 mol/L iron (II) chloride is mixed with 5.00 mL of 0.0030 mol/L sodium hydroxide. Does a precipitate form? (Ksp=4.87×10-17)! 11. For the following reaction, identify the species that is undergoing oxidation and the species that is undergoing reduction: I 12. Balance the following reaction in a basic solution: ´´ Zn + NO3 → Zn(OH)2 + NH3

11/variants/434511/take/8/ artizan Question 9 Given the redox reaction, F 2Fe +3+3Zn →2Fe + 3Zn+2, where is the transfer of electrons while the reaction takes place? COMPARANAEN A from Feto Zn 4 B from Zn to Fe +3 C from Zn² to Fe D from Fe to Zn +² 555555.000000000 ő ő ő ŏ ŏ Ŏ ŏ •oooooo000 All Changes Saved 7 of 20 Total Questions Answered KARTITAE HAYATAMENTO PAN Sma per pa pos Dann kann man das Seman PR Se pa pag PR Pen S S S S L A QE D < Continue ( 6/9/2

Touration analysis of a 24.0 mL aqueous HI solution was performed and the endpoint was reached upon the addition of 15.1 mL of 0.611 M aqueous calcium hydroxide solution. What is the concentration (in M) of the HI solution? HI(aq) +Ca(OH)2 (aq) - Cal (aq) + H2O(1) A: 0.769

2. Identify the complete redox reaction for a Zn/Zn2+||Fe³+ Fe cell. 4 A. 3 Zn (s) + 2 Fe(s) 3 Zn2+ B. 3 Zn² (aq) + 2 Fe (s) (aq) + 2 Fe³+ (aq) 3 Zn (s) + 2 Fe³ (aq) ( C. Zn (s) + 3 Fe³+ (aq) →→→ Zn²+ (aq) + 3Fe (s) D. 3 Zn (s) +2 Fe³+ (aq) →→→→3 Zn² (aq) + 2 Fe(s) 3. Identify the complete redox reaction for a Zn Zn²+AgAg cell. A. Zn(s) + Ag(s) > Zn²¹ (aq) + Ag¹ (aq) B. Zu²¹ (aq) + Ag(s) →→→ Zn (s) + Ag' (aq) C. Zn(s) + 2 Ag (aq) Zn²¹ (aq) + 2 Ag (s) >

< 2:50 Question 10 of 17 Which choice incorrectly identifies the oxidation number (O.N.) for the given species? A) CO³+, O.N. = +3 B) Br-, O.N. = -1 C) H₂, O.N. = +1 D) As³, O.N. = -3 E) Si, O.N. = 0 Submit Tap here or pull up for additional resources

6) In which reaction does the oxidation number of oxygen increase? 8 (2 A. HCl (aq) + NaOH (aq) → NaCl (aq) + H₂O (1) B. MgO (s) + H2O (1)→ Mg(OH)2 (s) C. 2SO2 (g) + O2 (g) → 2SO3 (g) D. 2H2O (1)→ 2H2 (g) + O2 (g) (PB) 10m R (3) + (ps) ldf, 3 (+2+(54) 560-(a)t(ps) 78m2.0

Identify the (a) element reduced, (b) element oxidized, (c) oxidizing agent and (d) reducing Na2Cr2O7 + FeCl2 + HCl -->   CrCl3 + FeCl3 + NaCl + H2O Bi(OH)3 + K2SnO2  -->  Bi + K2SnO3 + H2O MnS + HCl + HNO3   -->    MnCl2  + NO + S + H2O FeCl 3 + H2S --> FeCl2  + S + HC

Please don't provide handwritten solution .....

For problems 8-10, create balanced chemical equations for the reactions of the two compounds. Indicate the oxidation numbers for EACH atom participating in the reactions. Write the half reactions for each redox reaction. 8. Nickel (1V) oxide reacts with water and Iron to form nickel hydroxide and iron hydroxide. Pb+ Mn(SO.) -> Pb(SO4) + Mn 9. 2.

What will change the value of Ksp for Ag2CO3? Group of answer choices Remove carbonate ions from the solution. Add water to the solution. Heat the solution. Add silver ions to the solution.