25). One of your classmates, Chem 109 student said, “I can make a perchlorate buffer using equal amount of 0.1 M HCIO4 and 0.1 M NaCIO4." Will the solution prepared properly by this student functions as a buffer? Another word, can this solution be a buffer? а. yes d. need only ClIO, to make the buffer. c. need only HCIO, to make a perchlorate buffer. e. none of the above b. no

Out of the following, which is incorrect? Morvillmor (D a) A buffer solution is one that prevents its pH from changing upon addition of an acid or base. b) The buffering effect relies on the common ion effect. c) Buffer solutions are usually made by mixing an weak acid with its conjugate base. d) A buffer solution remains efficient regardless of the quantity of acid or base added to it. e) A concentrated buffer solution has a higher buffering capacity than a dilute one. DA

What is the pH of a buffer made by combining 45 ml of 0.15M nitrous acid and 20 ml of 0.175 M sodium nitrite a. 3.43 b. 3.64 c. 3.28 d. 3.06

Which of the following would be most effective as a buffer? A. pure water   B. a mixture of molecules that are bonded to each other with hydrogen bonds   C. a mixture of unbonded atoms   D. a mixture of molecules with ionic bonds that will break apart into ions   E. a mixture of nonpolar molecules

Which solution would be considered a buffer solution? 1) 0.50M NaF + 0.25M KF 2) 0.38M CH3COOH + 0.15M CH3COOH 3) 0.25M H2SO4 + 0.25M Na2SO4 4)1.25M LiNO3 + 0.50M HNO3 5) 0.50M NaCl + 0.50M HCl

Q: Suppose you add a strong base to the hypochlorous acid/hypochlorite buffer. Write out the chemical reaction equation that would occur when you add a strong base to this buffer. English (United States) O Focus MacBook PrO A B IU @ #3 2$ & 3 4 7 8 !! く ○

Which of the following aqueous solutions are good buffer systems?(more than one answer maybe required) a) 0.40 M sodium bromide + 0.30 M calcium bromide b) 0.25 M ammonia + 0.31 M barium hydroxide c) 0.14 M hypochlorous acid + 0.17 M sodium hypochlorite d) 0.25 M hydrochloric acid + 0.23 M potassium chloride e) 0.14 M potassium hydroxide + 0.24 M potassium chloride

Which of the following pairs cannot be used to make a buffer?   a. HF and NaF   b. HC2H3O2 and NaOH   c. HBr and KBr   d. NH3 and NH4Cl

Help needed

What chemical would have to be in the same solution as CHO2- in order to form a buffer?   Question 9 options:   CO2-    O2-    HCHO2   CO22-