A buffer is prepared by combining 17.6 g of H2CO3 (carbonic acid) with 220 mL of 0.18 M NAOH and diluting to 3.5 L. (K, = 4.3 x 107) (MM H2CO3 = 62 g/moll) %3D a) Calculate the initial moles of acid (before reaction) (. b) Calculate the initial moles of the OH base (before reaction) c) Calculate the moles of H2CO3 and the conjugate base HCO3 after reaction( d) Calculate the concentrations H2CO3 and the conjugate base HC03 after the reaction e) Determine the pH of the buffer H,CO, + OH 2 HCO, + H,0 Initial moles a b After reaction Concentration

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.