Question

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2. What does soluble mean? 3. You can test whether something is soluble in water by putting a little in water and observing what happens. If you try this with two different substances, one of which is soluble, and one of which isn't, what differences will you be looking for? 4. Define polar covalent compounds. Give an example.

Answer 1

0 Souble : The ability of the substance to get a given solvent is called ith solubility. The said to be soluble in the solvent. dissolved in. substanca is t ance will get dica/heared in water a a) One substance will get dware is soluble b) The other substance will be eithu Hoa till density is low o get sunk down (density is high in appear in the water. the watu 9F 200 (density is high) in ☺ Polar covalent compounds Covalent compounds are the compounds which are youmed Letween the atoms, whoe Electronegatively differences are low - or compounds which are formed by sharing of a butween the atome.re Elections are equally shaved - Polau Covalent compounds :- The covalent compounds which are formed by Sharing of e- but the Election density is not equally distributed due to more Electronegativity of one atom othan the other - are called Polour covalent compound. Ex:- ① CH₂cl The ee density c-cl. of the bond will be present more at -d atom . Hence ithue will be pautial +ve and -ve charges. . This is an example of Polas Covalent compound . H H W H é- density high Weas chlorine

be * The covalent compounds Non- polas covalent compounds :- are formed by ng open and aloo the Election density equally, edust buted between the atoms bonded. al called Non-Red Sharing of covalent compounde. There will be no changes ont no changes on the atoms. ** when symmetrical molecules are considered the olpole moments in Othosite diuctions - cancel and hence ne non-polas (though bonds ou blon) molecule becomes non-polar (thouge O_TII I @ monicule e-density Equally shared. cely Td. El 8- tc. sice 1 d ! U Tetrahedron These dipole cancel each other (u=0.) = dipole moment=0 e molecule is Non-Polas. © - Hand aator Vs Set watu - the water which contains bicarbonatu, chlorides and Sulphodes of calcium and magnesiumy is called Hard watu. Hard watu do not produa father with soap Hard water readily. Temporary Hardnio Bicarbonatus of Co, mght Peumanent Hardnica. & et, soys of Casermations → Sort water- alatur which does not contain salts or contains Nat ion Salt ise called soft watu. Produces lathu with soap Headily.

I gallon = 3.7854 litres 2 pounds & 907 18 grams pound = 453.59 grams 2 pounds - 2x (45359) = 907. 18 grams. © Nad Nad into Nat, cl ion - will dissolve - will disentere dissociates in watu CH₃ CH₂ CH₂ will not dissowe Non- kt 00CT CHg7, CHz - will dissolve -- dissociates into come na Polasco ooc Echat CH₂ will dissolve dissociates into cons. Polas, in Watu oso ECH CH₂ will dissolve closociates into cons. Polar in watu Na