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25 Oct 2006 18:53:04 IST

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titration normality problem...

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25 ml. of sol. containing 6.1 gm/litre of K_xH_y (C₂O₄)_z.nH₂O required 18 ml of 0.1 N NaOH and 24 ml 0.1 KMnO₄ in two separate titration. Calculate x, y, z and n.

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arun-rashi

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Joined: 19 Oct 2006

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1 Nov 2006 22:54:29 IST

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Step 1. for acid base titration between acidic H⁺ & NaOH we apply conservation of meq so factor is y and meq. of NaOH is 1.8 so, (W*y/mol.wt)*1000=1.8..................(1)

Step 2. Apply redox titration b/w oxilate ion and (MnO₄)^- and again conservation of meqs. where factor of oxilate is 2z so w*2z*1000/Mol.wt=24*0.1*5 ...........(2)

Step 3. Apply in any rection charge on cation =charge on anion.So we create simplest ratio b/w x,y,z

Step 4. by this we calculate mol.wt of salt

Step 5. After calculating mol.wt we easily find out 4th unknown i.e. n.

hemang

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Joined: 27 Dec 2010

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27 Jan 2011 11:43:08 IST

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