Introductory Course of Quantitative Chemical Analysis Henry P Talbot 8 7
Introductory Course of Quantitative Chemical Analysis Henry P Talbot 8 7
Talbot Henry P.
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250 normal. 700 cc. Of the solution are available. To whatvolume must it be diluted? !Answer!: 1084 cc. 17. Given the following data: 1 cc. Of NaOH = 1. 117 cc. HCl. The HClis 0. 4876 N. How much water must be added to 100 cc. Of the alkali tomake it exactly 0. 5 N. ? !Answer!: 9. 0 cc. 18. What is the normal value of a sulphuric acid solution which has aspecific gravity of 1. 839 and contains 95% H_{2}SO_{4} by weight? !Answer!: 35. 61 N. 19. A sample of Rochelle Salt (KNaC_{4}H_{4}O_{6}. 4H_{...2}O), afterignition in platinum to convert it to the double carbonate, istitrated with sulphuric acid, using methyl orange as an indicator. From the following data calculate the percentage purity of the sample: Wt. Sample = 0. 9500 gramH_{2}SO_{4} used = 43. 65 cc. NaOH used = 1. 72 cc. 1 cc. H_{2}SO_{4} = 1. 064 cc. NaOHNormal value NaOH = 0. 1321 N. !Answer!: 87. 72 cc. 20. One gram of a mixture of 50% sodium carbonate and 50% potassiumcarbonate is dissolved in water, and 17. 36 cc. Of 1. 075 N acid isadded.
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