Consider a buffer solution formed from 0.1M HF and 0.1M NaF.
1) from 0.1M HF and 0.1M NaF:
a) What four species, beside water, are extensively present in solution? (Hint: the 4th one is from the dissociation of HF)
b) Which of these ions is present as a spectator ion?
c) What equilibrium exists for the remaining ions?
a) H+, HF, F- and Na+ are the four major species present in the solution.
b) Na+ ion is the spectator ion.
c) The equilibrium is
HF (aq) <-------> H+(aq) + F-(aq)
Comment if any problem
Consider a buffer solution formed from 0.1M HF and 0.1M NaF. 1) from 0.1M HF and...
Consider a buffer solution formed from 0.1M HF and 0.1M NaF. 1) If a compound containing H+ is added to this solution, what direction will the equilibrium reaction shift and what species is consumed in the process? 2) Why is it necessary, then, to have NaF as well as HF present for this solution to behave as a buffer?
2. HF ionizes in water to produce H.O'(aq) and F (aq) ions. 0.22 M Naf solution is added to a 0.10 M HF(aq) at 25°C. The Ka of HF is 3.5 x 10-5. (Hint: NaF is a salt. F is the common ion for the equilibrium). Calculate the pH of the solution. Show work.
The pK, value for HF is 3.14. Would a buffer prepared from HF and NaF with a pH of 5.14 be considered to be an effective buffer? A buffer in which the mole ratio of NaF to HF is 1.7 has a pH of 3.36. Would this buffer solution have a greater capacity for added acid (H307) or added base (OH)? added acid added base Submit Answer Retry Entire Group 9 more group attempts remaining
A buffer solution is 0.429 M in HF and 0.341 M in NaF if K, for HF is 7.2x104, what is the pH of this buffer solution? Submit Answer Retry Entire Group 8 more group attempts remaining A buffer solution is 0.475 M in H2S and 0.388 Min KHS. IFK for H2S is 1.0 x 10", what is the pH of this buffer solution? PH Submit Answer Retry Entire Group 8 more group attempts remaining
A buffer solution is 0.332 M in HF and 0.231 M in NaF . If K2 for HF is 7.2x104, what is the pH of this buffer solution? Submit Answer Retry Entire Group 9 more group attempts remaining A buffer solution is 0.333 M in H2CO3 and 0.358 M in NaHCO3. If Kl for H2CO3 is 4.2 x 10-7, what is the pH of this buffer solution? pH= Submit Answer Retry Entire Group 9 more group attempts remaining
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?
Use this description to answer the questions: Solution 1 is 0.1M weak acid HF and the pH is found to be 2.8. Write the acid dissocation reaction for HF. Solution 2 consists of the same 0.1 M weak acid HF but in 1.0M sodium nitrate. Write T if the statement is true, F if it is false. The pH of solution 1 and solution 2 will be the same within statistical error. The pH of solution 2 will be lower...
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF. This is a mixture of conjugates in equal proportions, which tells you that it is a buffer. What two reactions are relevant to the pH in this situation? NaF --> Nat + F F+H2O <--> HF + OH- HF + NaF --> H+ +Na+ + F2 HF <--> H+ +F Ht+F<--> Nat + F" Question 2 1 pts A buffer solution contains a mixture...
1 of 20 Consider a buffer solution that is made out of hydrofluoric acid (HF: Ka = 3.5.10-) and sodium fluoride (NaF). The buffer rage of this buffer solution is: 2.5. 10-4 to 4.5.10 2.46 to 4.46 2.96 to 3.96 3.46 to 5.46
please answer all
(16. A 1.0L buffer solution is 0.10M in HF and 0.050M in NaF. Which of the following actions will destroy the buffer? A) Adding 0.050 mol of HCI B) Adding 0.050mol of NaOH Adding 0.050 mol of NaF D) None of the above 17 The most important blood buffer is: A) Carbonate/bicarbonate buffer B Protein buffer C) Phosphate buffer D) Lactate buffer E) Tartrate buffer 18. What type of bond is being cleaved during the conversion of...