Calcuate the pH of benzylpenicillin sodium solution (600mg/2mL) for injection (pKa=2.76, MW=356g/mole)
Calcuate the pH of benzylpenicillin sodium solution (600mg/2mL) for injection (pKa=2.76, MW=356g/mole)
What is the pH of a buffer solution prepared with a 0.5 M sodium citrate and 1% citric acid (pKa for citric acid = 3.13, MW = 192 g/mole).
1. What is the pH of a buffer solution prepared with a 0.4 M sodium citrate and 1% citric acid (pka for citric acid - 3.13, MW - 192 g/mol)? 8. A buffer solution is prepared using 0.4 mole of a weakly basic drug (pka - 10.1) and an unknown quantity of its salt. The final solution has a pH of 8.99. How much of the salt was used? 9. A buffer solution with a desired pH of 8.15 needs...
a) Calcuate the pH of a solution with [H3O+] = 6.54 x 10-3 M b) Calcuate the pOH of a solution with [H3O+] = 8.5 x 10-9 M c) A solution has a pH = 2.420, what is the [OH-]? d) A solution has a pOH = 1.0, what is the [OH-]? e) Calcuate the pH of a solution with [OH-] = 5.9 x 10-6 M
Consider a 1L, 200mm acetate buffer with pH = 6.0 and with a pKa of 4.73 C) What weight in grams of Sodium Acetate is needed to make this solution? MW Sodium Acetate = 136.08 g/mole > Ratio of ( x ) = 18.62 Instructor's Notes (9/6/19): If you were wondering why this sodium acetate has a higher MW than standard Sodium Acetate, it's because its Sodium Acetate Trihydrate as opposed to anhydrous Sodium Acetatel Take a moment to solve...
please answer all three
6. You made a solution of sodium benzoate by dissolving 1.9gm of sodium benzoate in 20ml of distilled water. Calculate its molarity (MW of sodium Benzoate 144gm) 7. You added 2ml of 3M HCL to the above benzoate solution and tested the pH which was 3.1. Given that the PKA of benzoic acid is 4.1, what are the ratios of sodium benzoate of benzoic acid in your reaction? 8. In the above experiment, what is the...
For acetic acid pKa =4.74. A buffer solution was made using 0.30 mole of acetic acid and an unspecified and amount of sodium acetatein water to make 2.00 liters of solution. The solution pH was 4.91. Calculate the number of moles of sodium acetate used.
1.Calcuate the pH of a solution with [H3O+] = 6.54 x 10-3 M 2.Calcuate the pOH of a solution with [H3O+] = 8.5 x 10-9 M
1.You need to make 1 L of 0.1M HEPES (pKa 7.55) at pH 8.0. You have the HEPES sodium salt (MW 260.3) and 6M HCl. How would you make the buffer? 2. You add 2mL of 5MHCl to the liter of 0.1M HEPES,pH8.What’s the new pH?
Convert 2.0 M of Phenobarbital sodium (MW: 254 g/mole) solution in water into % w/v and ratio strengths.
benzoic acid has PKa of 4.2 and MW 122g/mol. sodium benzoate has MW 144g/mol . a) mixing 50 grams of benzoic acid with 50 grams of sodium benzoate will lead to the same PH as mixing 200 grams of each. How do they differ in buffer capacity?B) could benzoic acid/ benzoate act as a buffer at PH 6.0? why or why not?C) what concentration of benzoic acid and sodium benzoate should be used to prepare a buffer that has a...