1A. A buffer is made of 4.00 g HF and 10.00 g NaF in 80.0 mL of solution.
Calculate the pH of the buffer. (You will have to look up the Ka of the acid.)
1B. Add 1.00 mL of 2.0 M NaOH to the buffer. Assume no changes in volume.
Calculate the new pH of the buffer.
1a. A buffer solution is prepared by mixing 15.0 mL of 2.00 M Acetic Acid and 10.0 mL of 1.50 M NaC2H3O2. Determine the pH of the solution after the addition of 0.01 moles NaOH (assume there is no change in volume when the NaOH is added). Ka HC2H3O2 = 1.80E-5 1b. A buffer solution is prepared by mixing 55.0 mL of 1.15 M HF and 99.0 mL of 0.450 M NaF. Determine the pH of the solution after the...
a 1.00 L buffer solution comtains 0.10 M HF and 0.05 M NaF. the value of the acid ionization constant, Ka, for HF is 3.5 x 10^-4. a) calculate the new PH after addimg 0.010 mol of NaOh to the buffer. b) calculate the ph of the 1.00 L of the solution upon addition of 40.0 mL of 1.0 mL of 1.0 M HCL to the original buffer solution.
A 360.0 −mL buffer solution is 0.150 M in HF and 0.150 M in NaF. a) What mass of NaOH can this buffer neutralize before the pH rises above 4.00? = 1.6 b)If the same volume of the buffer were 0.370 M in HF and 0.370 M in NaF, what mass of NaOH could be handled before the pH rises above 4.00?
We have 100 mL of a buffer that is made to be 0.1M HF and 0.075M NaF. What is the pH of the buffer? What is the pH of the buffer after 0.0015 moles of HNO3 has been added? What if the pH of the buffer if I add 0.0015 moles of NaOH instead of acid? What would the concentration of the HNO3 (from the previous question) if the 0.015 mole acid were contained in 1.0 mL of HNO3 solution?
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Determine the pH of a buffer made by mixing 0.040 mol HF and 0.050 mol NaF into warm a 4.00-L solution. The Ka of HF at the warmed temperature is 8.5x104. Watch your SF!
A buffer is prepared by adding 45.0 mL of 0.15 M NaF to 35.0 mL of 0.10 M HF. What is the pH of the final solution? The Ka of hydrofluoric acid is 6.8 x 10-4.
What is the pH of 1L of buffer made from 0.6M HF and 0.54M NaF (pKa of HF = 3.45)? If 0.01M HCl is added (disregard change in volume), what is the new pH? If 0.01M NaOH had been added instead?
5) A 1 L buffer solution is 0.520 M in HF and 0.520 M in NaF. Calculate the pH of the solution after adding 0.220 moles of NaOH. Assume no volume change upon the addition of a base. Ka for HF is 3.5 X 10-4
A buffer is prepared by mixing 75.0 mL of 0.40 M aqueous HF and 25.0 mL of 0.80 M aqueous NaF. At 25oC, Ka = 3.5 x 10-4 for HF. SHOW WORK (a). (4 points) Calculate the pH of the buffer. (b). (4 points) Your instructor accidentally dropped the bottle containing the buffer in part (a) in a bucket of water, that initially contained 4.00 L of water. What is the pH of the resulting solution?
1. A buffer is 0.100 M in HF and 0.100 M in NaF. When a small
amount of nitric acid is added the pH only slightly drops. Write
the chemical equation that shows the added nitric acid being
neutralized by this buffer.
2. What is the pH of a buffer that is 0.120 M formic acid
(HCHO2) and 0.080 M in potassium formate (KCHO2)? The Ka of formic
acid is 1.8 x 10^ -4 .
3. The curve shows the...