Question

Part A (acidic) HfO2 (s) → Hf(s) Express your answer as a half-reaction including electrons and phases. AJO O ? Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Part B (basic) Ni(OH)2 (s) → Ni2O3 (s) Express your answer as a half-reaction including electrons and phases.

Answer 1

Hfc82 9. trin iş ilan O. +90268 (acidic medium) nfo is (balance no a tifo + 2 holl į o nom first) funny Hd O2 (s) + UHT - Hars, (To balance Hatom old mot rice of equivalent amant) at 2tholl on other t/O2 (s) + Htay the Hals, + 212011, ©). Ni@H), (3 - Niz O3 (STP ; Cbasic wedium) werden in t h e firet balance Ni atom 2w7@u), ( Dj Niz O3 18 add ho to balance o atom a no 2N; OH), is's - Nin 03 (s, t.thotels add Htion to balance enuss hatom 2 NICH), is - Niz Osis, at thold, t2Ht lag add OK ion in equal amount to that of Mtion in both side. 2N;(OH)₂ IS, + 2014 og Ni2O3 (5, + 12011, at 2H+ Age + 204 by

out on to make water add wo fit and lі. 2 Ni(OH)2 (3) 4 201 lang . ) at Nizo 3 (3) it : + 2H2011 and add : é to Pa r is add tho molecules balance charge 2 Ni CH), is, 4 2016ng) - NiO2 159 + 310 (1) 26 ☺. Nos cimi NO2 (quot Cacidic medium) No Noz lage NO2(g) + tho (l add it on other side to balance in atom Noz lag & 2 Helag NO₂ (g) + tho a add é to balance charge f o r Noigo & tho. the .. NO lag + 2H tag te

В», ер — Br 4 balance Br atom Brg lag 2 Bn Ozan Now balance o atom by adding H₂O 1. Bra kaq & 6th 0 1 2 Br Oz logo add Ht to balance A atom Br2 lag + 6thoa - 2 Br Oz (aq + 12 H tagal add Oh both side of équivalent oinant. as it in 1. Brz lap + 6+40 W a 1204a 2 Br Oz (aq) + 12 ntage + 120H"cage endd fet. and OH to make the Bro aq +6+20 H + 12 Ohan ~. 2 Bn Oglan + 12 2012 camed no. of tho molecule Bra lag t. 12.04 lag 2Br 0₃ (aq? at 6120 la add é to balance charge Bracaq at 12 of Cape - 2Br Oz fogo of 6th OU) + 106