| Mole concept:- Mole – chemical unit for number mass and volume * Mole in terms of number: – Collection f number 6.022 x 1023 Particles of any substance are called one mole One mole = 6.022 x 1023 particles = Avogadro number One mole = 602 200 000 000 000 000 Number of moles = no of particles given / 6.022 x 1023 ( 1 ) Calculate the no of moles in 6.022 x 1025 particles Ans. – no of mole = 6. 022 x 1025 / 6.022 x 1023 =100 6.022 x 1023particles = 1 mole 6.022 x1023 = 100 mole * Mole in terms of mass: – Weight of 6.022 x 1023particles of any substance in gm is called one mole One mole Na = 23gm One mole Ca = 40gm Page no.- 02 The formula wt of any substance in gm is called one mole One mole NaoH = 23 +16+1 = 40 One mole CaCO3 = 40+12+16×3 =100 One mole NaCO3 = 23X2+12+16X3 = 106 One mole KMnO4 = 39+25+16×4 = 157gm One mole K2Cr2 = 39X2+52X2+16X7 =294gm One mole C12 H22O11 = 12×12+1×22+16×11 =342gm One mole FeC2O4 = 56+12X2+16X4 =144gm One mole NH2CONH4 = 14+2+12+16+14+2 =60gm One mole H2SO4 = 2+32+16X4 =98gm One mole H3PO4 = 3+31+16X4 = 98gm Substance particles formulated mole element atom at gm atom· ( H, Na, K ) Compound molecular gm mole or gm molecular ( H2, HCL NaCl ) Radical 10w ionic gm ion ( H+,CH-,Cl- ) Use of mole concept of element One mole Ca = 6.022×01023 atom = 40gm = one gm atom of ca One mole Na = 6.022x1023atom = 23gm One mole of x = one gm atom of x One mole = 10 decimal = 100 centriole = 1000millimole No of an electron in one atom of an electron =at no No of e2 in one atom of ca =20e2 = 20p |
