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Biochemistry and biology
Some Basic Ideas of Chemistry Mass and Stoichiometry
Hormone balance > Section: Some Basic Ideas of Chemistry > Mass and Stoichiometry
Chapter: Some Basic Concepts of Chemistry
Mass and Stoichiometry
Question one particular 2 . a few moles of sulphuryl chloride were blended in water to produce sulphuric acid and hydrochloric acid solution. How a large number of moles of KOH will be required to entirely neutralize the solution? Ans. SO 2Cl2 & 2H2O H2SO 4 + 2HCl
Mol of HCl produced from 2 . 5 moles of SO2 Cl2 sama dengan 5 mol Mol of H2SO 4 produced from 2 . 5 moles of SO2Cl2 = installment payments on your 5 mol H2SO4 + 2KOH HCl + KOH K2SO some + 2H2O; KCl + H2 O
Now, a few mol of H2SO some require KOH = 2 . 5 mol Total KOH required = 10 + 2 . 5 = 12. 5 mol.
Question 2 Two stomach acids H2SO4 and H3PO4 will be neutralized individually by the equivalent an alloisomer when sulphate and dihydrogen orthophosphate will be formed respectively. Find exactely masses of H2SO4 and H3PO4 [at mass L = 31] Ans.
H2SO4 + 2NaOH Em 2SO4 + 2H2O H3PO4 + NaOH NaH2PO4 & H2O Comparative of alkalinity = 1 g equal of H2SO4 = one particular g comparative of H3PO4 The two acids must respond in the percentage of their equivalent masses. Comparative mass of H2SO4 sama dengan Equivalent mass of H3PO4 = Hence ratio of masses of H2SO4: H3PO4 = 49: 98 =1: 2 . Question three or more What is the mass of 2 litre sample of normal water containing 25% heavy drinking water (D2O) in it by simply volume? Thickness of water is 1 ) 0 g cm-3 where as that of D2O is 1 . 06 g cm-3. Ans.
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Question 4 Differentiate between molar mass and equivalent mass of a compound? Ans.
The mass of 1 mole of particles is called molar mass. The number of choices (atoms or perhaps molecules) contained in a gustar mass is usually equal to six. 023 Г—1023. The number of parts by fat of a substance that combines with or displaces 1 . 008 parts by excess weight of hydrogen or almost eight. 0 areas of oxygen or perhaps 35. a few parts of chlorine is called its equivalent excess weight. Or the volume of a substance in grams numerically comparable to its equal weight is named its gram equivalent pounds. Question five What is how much copper from 100 g of birdwatcher sulphate? (Atomic mass of Cu sama dengan 63. your five u) Ans.
Question 6th How a large number of grams of oxygen (O2) are required to completely react with 0. 2 hundred g of hydrogen (H2) to deliver water (H2O)? Ans. The balanced equation for the response is:
4 g of H2 requires oxygen sama dengan 32g
0. 200 g of H2 requires o2 =
Issue 7 Precisely what is the vapour density of the gas if perhaps its molecular mass is definitely 22? Ans. Molecular mass = a couple of vapour thickness = a couple of 22 = 44.
Problem 8 What is the atomic weight associated with an element in whose specific heat is 0. 214 cal/gm? Ans.
According to Dulong pettits legislation, Atomic warmth capacity of elements (metals) = 6th. 4 california mol-1 sama dengan gram atomic...