Question

9. Treatment of gold metal with BrF3 and KF produces Br2 and KAUF4, a salt of gold. Identify the oxidizing agent and the reducing agent in this reaction. Find the mass of the gold salt that forms when a 73.5-g mixture of equal masses of all three reactions is prepared. 10. We prepare a solution by mixing 0.10 L of 0.12 M sodium chloride with 0.23 L of a 0.18 M MgCl2 solution. What volume of a 0.20 M silver nitrate solution do we need to precipitate all the Ci-ion in the solution as AgCl?

I really need some help with number 9 and number 10 I really appreciate the help!

Answer 1

Ana Bot, Ant 9. The reaction is 2 Auta Br Ezt a KE 2 Borgt 20 KAUF there BrCITT) converted to Breo) and Aufo n - Aucun 36, Br is reduced. So here onédiseng ogers น% By Cu)) Here Atefoisonidizengageot. 8o, He Here suco) is onedired Bo, tere reduceng agent ils Aucos Total menture 2 73.59 Fach Reactant 2.24.59 a A42 245g 0.1944 197g/mol 1244 moles

Sufge 34.59 136.99/ mol 20.1996 mol KF 250 20-4219 mol 58.1g/mol Due to howest no. of moles are will be the remetion otrogent from 2 moles of Aus 2 moles of susalt dormed. Here 0.1244 moles of KAUFB dormed. mass of the satt formed, o. 1244 moles x 293.069/mol 236.45 g oloL esntains 0.012 moles Noel 20.012 moles el D-231 20.0414 moles ngela 20.0828 motes el- Tongela aee-2 Total moles of el-> (0.012 to. 0898) 20.0948. moles Total vowene so gol do 23 L 20.33L. To precipitate smole of ce, I mole of Agnozes. Yeauired 30, horeo.0948 moles of Act is reauired. og motes of Agnog obtained from all 5o.ogar motes of Agovog obtained from: ILXO.0948 moles 0.474L O moles