LUBRICANTSNUMERICALSUNSOLVED 1 1.PROBLEMS ON SAPONIFICATION VALUE: i. 1.55 gms of an oil sample is saponified with 20ml of N/2 alcoholic potassium hydroxide solution. After refluxing the mixture, it requires 15ml of N/2 HCl solution. Find saponification value of oil.(Ans =90.32 mgs of KOH) ii.1.25 gms of an oil was saponified with 50ml of 0.1N potassium hydroxide solution. After refluxing.the mixture required 7.5ml of 0.1N HCl for neutralization. Find the saponification value of the oil.(Ans= 190.4mgs of KOH) iii. 6gms of an oil was saponified with 50ml 0.5N alcoholic KOH. After refluxing it for 2hrs,the mixture was titrated by 25ml of 0.5N HCl. Find the saponification value of oil.(Ans=140mg of KOH) 2.PROBLEMS ON ACID VALUE i.A vegetable oil was tested for its acid value.10gms of oil required 0.2ml of KOH. Find its acid value. (Normality of KOH=0.02N)(Ans=0.0224mgs/gm) ii.Find acid value of given oil whose 20ml required 2.8ml of N/10 KOH during titration (density=0.86gm/mol) . State whether oil is proper for lubrication or not. (Ans= 0.911, ssssnot suitable)