▼ Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05? HF/KF HNO2/KNO2 NH3/NH4Cl OHCIO/KCIO Submit Previous Answers ✓ Correct The best buffer will be the one whose weak acid component has a pK, closest to the desired pH of the buffer. Since the pK₂ of NH4+ is 9.25, and the desired buffer pH is 9.05, the best choice for the buffer is NH3/NH4Cl. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer using two significant figures. [5] ΑΣΦ m (NH3) m (NH,CI) 3 → ?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.