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Lecture 9 Solutions; concentration & dilution

Lecture 9 Solutions; concentration & dilution -...

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Lec-9: Solutions; concentration & dilution Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 1 Solutions Solutions are homogeneous mixtures of two or more substances. Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 2
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Solutions S l ti I t t Solutions are Important Most of the Chemistry which makes life possible occ r in aq eo s sol tion occur in aqueous solution Medicine Agriculture Etc. Solution: Solute + Solvent S l S l l l C d Solute: Salts, Molecular Compounds Solvents: Water, Organic, etc Change concentration by using different Change concentration by using different amounts of solute and solvent Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 3 Solutions Average Concentrations of the 11 Major Constituents of Seawater. Ions g/kg mmol/kg mmol/L Na + 10.781 468.96 480.57 K + 0 399 10 21 10 46 0.399 10.21 10.46 Mg 2+ 1.284 52.83 51.14 Ca 2+ 0.4119 10.28 10.53 Sr 2+ 0.00794 0.0906 0.0928 Cl - 19.353 545.88 559.40 SO 4 2- 2.712 28.23 28.93 HCO 3 - 0.126 2.06 2.11 Br - 0.0673 0.844 0.865 B(OH) 3 0.0257 0.416 0.426 F - 0.00130 0.068 0.070 Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 4 Total 35.169 1119.87 1147.59
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Solutes in aqueous solutions Molecular Compounds in Water (e g
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