Hence option c is correct.
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d. -3 4. How many moles of Rb+ are present in 150 mL of a 0.60 M solution of Rubidium Carbonate? a. 0.090 mol b. 0.50 mol c. 0.18 mol d. 0.25 mol
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4) Answer the following a) How many moles of H were added to the buffers by adding 0.50 mL of 1.0 M HCl? a b) How many moles of conjugate base (A-) are present in 40 mL of the 0.10 M Buffer at pH 7.5? c) How many mol es of conjugate base (A-) are present in 40 mL of the 0.10 M Buffer at pH 6.0? d) Use the Henderson-Hasselbalch equation to predict how much the pH should change...
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of 1.0 M NaH2PO4. How many moles of HCI must be added to this buffer solution to change the pH by 0.40 units? Assume the total volume remains unchanged at 400 mL. For H2PO4, K = 6.3 x 10-8 0.013 mol 0.25 mol (Your answer) 0.50 mol 0.057 mol (Correct answer) 0.031 mol
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