If equal molar amounts of NarHPO, and NavPO,are mixed in water, calculate the re

Question

If equal molar amounts of NarHPO, and NavPO,are mixed in water, calculate the resulting pH The exas of phosphoric acid are 2.1, 7.2, 12.4. Calculate the percent of cysteine molecules which will havethe sulfhydryl group hydrogen dissociated a pH The p&A; for the cysteine side chain is S.3 which amino acid would migrate the furthest toward the anede positive clectrode) during paper diecerophonesis at 70 and why? aspartic acid b alanine Calculate the pH that results when 075 walofuRuisadded to l0wualefisorleetric histidine in 100 ml of water. The a&U;,for histidine are l-B,60, and 92. a 6.5 8,8 What volume of 2NURuisrequired completely tirato a4 asparate GaaaSasolution Explain a 2 ml c,4 ml 6 ml or more

Explanation / Answer

2) using henderson-hasselbach equation,

pH=pka+log [base]/[acid]

so, pH=pka2 +log [Na2HPO4]/[Na3PO4]

or,pH=7.2+log 1 [[Na2HPO4]/=[Na3PO4],for equimolar quantities]

pH=7.2

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