Question

8 The Following reaction is classified as: 2HCl(aq) + Ba(OH)2(aq) → BaCl(aq) + 2 H20(0) b) precipitation reaction oxidation-reduction reaction d) acid-base neutralization reaction 9. c) single replacement What is the volume of 0.1220 M HNO, solution required to completely neutralize 17.50 ml of 0.1211M NAOH? Reaction is: HNO, (aq) + NaOH(aq) -NaNO, (aq) + H:0 (aq) a) 17.37 ml b) 16.31 ml. c) 15.39 ml. d) 17.84 mL 10. Which one of the following reactions is the reduction reaction? a) Cu?+ (aq) + 2e - Cu (s) b) Cr(s) - Cr(aq) + 3e c) Cu-Cu?" + e d) Fe -Fe2+ + 2e 11. Using the following portion of the activity series of elements Ca(s) - Ca²+ (aq) + 2e (strongly reducing) Al(s) - APP+(aq) + 3e Cu(s) - Cu²+ (aq) + 2e- (weakly reducing) Determine which one of the reactions will occur. a) Cu(s) + Ca2+ (aq) b) Al(s) + Cu?+ (aq) c) Al(s) + Ca?'aq d) Cu(s) +Al+(ag) 12. In the following combustion reaction of methane gas (CH) with oxygen is given. How many (g) of H20 is produced when 0.533 moles of CH4 reacts with O2? a) 15.23 g b) 9.60 c) 19.21 g d) 17.21 g 13 How many grams (g) of NaCl are needed to prepare 250.0 ml of 0.365 M of NaCl. Solution? a) 5.34 g b) 10 25 g c) 3.65 g d) 7.21 g

Answer 1

The complete calculation is given as below:-

Reachion 9iven by- Ba cle (a2) +2heo 2HCR (a1) Bq OH) (az)- Since, the aboveMeactiony a neaction a acid (hce) and base Ba CH) So thuj eaction ia acid-bage neutnali z ation Then the comect opti on wil be acid- bage netrali zation neaction

Inihal volumeVi)= 3 ,CFan aci d) Concendtration (G) = 0.122O M,CFOn acid) Final volume ve) 7-50ML, CFon base) Final Concentahion (ce) O-1211 M, CFon base) Then CIXVI C2xVs VI CXV2 CI .1211M)x CISo ML) CO.1220 m) 2.11925 O1220 on Vi mL= 17 31 mL So volume a HNO 3 wil be VI1731 mL 17.37 mL So the Conn ect ophon will be (a

In case af reduction 1eaction, thene wil be tthe acceptqnue athe electro n So, the neduch on neaction iven by Cu2t f) t2e CuS) Thin the Con ect opthorn wielbe CuCs) Cutt @z) +2e a

Ca(s) Caa)+2e (t1 ,E=+2.8 7V ARES) AR3L)+3, E t 66V Cus) Cu2t )2e,E 034V oxid ation half cell neachon Cqt ar)2 e E 2.87V Ca S) A3t a) 3e E 66V AlG) Reduction half cell neacton Cu (S,E0 Cult a) 2e = t0.34V Net neaction oxid atont Reduchon neachon 3+ ARtaL) Cus) EO 2V-positive AllS) Cua) The above eachon wia Dccur Sothe comect ophonwial be (bARG)Cutaz)