Question

Use the following unbalanced redox reaction to answer the next four (4) questions. C2042- Mno2 + _co32 MnO4 Assuming that the reaction is carried out under acidic conditions, what is the coefficient of Ht in the balanced reaction? Coefficient for H = Submit Answer Tries 0/2 Which of the following is the oxidizing agent? MnO2 MnO4 H+ C2042 со,2 Tries 0/2 Submit Answer What is the value of n, the number of electrons in the balanced reaction? Tries 0/2 Submit Answer What is the oxidation state change for carbon in this reaction? +6+2 +6+4 +4+6 +3+4 +3+6 Tries 0/2 Submit Answer

Answer 1

Mng It sou2 - mno & com? H-2H+ o₃H₂O MnO₂ x+41-2)=-1|2x+41-2)=-2 X+2(-2)=0 | 2+3(-2)=-2 x=+7 21:+6 x=+ 4 x =+4 1-43 oxidation half reaction Reduction half reaction anon -> ung Balance all atoms except oxygen and hydrogen mno - mną balance à atoms by adding Ho molecules: Goth & 2487 260 mno- ming+ 2H2O balance 'H' atoms by adding til rons Core + 240) 2007 2 + 4H+ non +44_3 ming + 2HO balance charge by adding electrons. con + 2H20 ) 220 + 4H+ 2€ non + 4H + 32 -> ming + 240 multiply with suitable integer to equalise number of electrons 03 | JX2 300 + 640 620 241 24t+ 6€ / 2ming + 8 + + bel) 2100 +440 add both. 36002 + 60 - 6cg + J HT TOFA z mngilt lett + 60 - 2 ming +4450 zmno +350 +240 - 2 mmg + 6 core + 4Ht! con efficient of itt a 4r number of electrons in balanced oxidised species = co-2 I reaction = 6 Reduced species non oxidation state of carbon oxidizing agent a mnold From: (+3) To (+4) Reducing agent a cour

in a chemical reaction if an atom ion ar molecule loses electrons, it is sard to be oxidised and is called a reducing agent. and it it gains electrons it is on said to be reduced and is called an oxidising agent.