What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of 0.1 M NaH2PO4? (For H3PO4, pKa1 = 2.1; pKa2 = 6.8; pKa3 = 12.5) Ans in 2 significant figures
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What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of 0.1 M NaH2PO4? (For H3PO4, pKa1 = 2.1; pKa2 = 6.8; pKa3 = 12.5) Ans in 2 significant figures
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- What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of 0.1 M NaH2PO4? (For H3PO4, pKa1 = 2.1; pKa2 = 6.8; pKa3 = 12.5)Calculate the pH of a buffer in which [HC4H7O2] = 0.36 M and [C4H7O2 –] = 0.31 M. How do you calculate pKa acid dissociation constant？？How many mL of 0.600 M NaOH should be added to 5.38 g of carbonic acid (H2CO3, FW = 60.02) (pKa1 = 6.351, pKa1 =10.329) to give a buffer with pH = 9.50 when diluted to 250 mL?
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- A weak acid has Ka of 4.47 x 10-4. What is pKa for this weak acid?What is the pH of 500mL of a buffer solution of HC3H5O3 0.0570M and C3H5O3Na 0.0275M? Ka of HC3H5O3 = 1.9x10^-5The base ephedrine has a pKa value of 9.6. Calculate the theoretical end point pH when a 0.1 M solution of ephedrine is titrated with 0.1 M HCl.