Is the pH of solutions important when using the Fluoride ISE? If so, why?
pH is important as hydrogen ion complexes with portion of fluoride ions to form HF and HF2- at a pH below 5 due to which the pH is important.
Is the pH of solutions important when using the Fluoride ISE? If so, why?
The selectivity coefficient for a fluoride ISE is 0.1.
(1 pt) What is [OH-1 at pH 5.5 and pH 10.0? If a fluoride ISE gives a response of +64.7 mV versus SCE when placed in 1.5 x 10-5 M F- at pH 5.5, what would the measured response be at pH 10.0 (assuming no change in ionic strength)? Would you over- or underestimate the fluoride concentration if you tried to use it at pH 10, and by about how much?...
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4) Why is the pH of a 0.1 M solution of sodium fluoride not equal to 7? A) The sodium ion reacts with water to release hydroxide ions, making the solution basic. B) The floride ion reacts with water to release hydroxide ions, making the solution basic. The sodium ion reacts with water to release hydrogen ions, making the solution acidic. D) The fluoride ion reacts with water to release hydrogen ions, making the solution acidic.
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When aqueous solutions of sodium fluoride and nitric acid are mixed, an aqueous solution of sodium nitrate and hydrofluoric acid results. Write the net ionic equation for the reaction.
Buffers are sometimes called “chemical sponges”. Explain why? Explain why some solutions have buffering capacity and others do not. The lungs and kidneys contribute to pH regulation. Why do you think these are important, when buffer systems minimize pH fluctuations in body fluids?
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