H3PO4, what is the pH of the buffer mixture? The pKa of H3PO4 is 2.1. Acidic Buffer Solution:Let us assume the addition of a small amount of acid or base to a buffer solution. The change in pH value of solution will not...
The {eq}\rm pK_a {/eq} of {eq}\rm H_2PO_4^- {/eq} at {eq}\rm 25 {/eq} degrees Celsius is approximately {eq}\rm 7.2 {/eq}. At pH {eq}\rm 6.2 {/eq}, what is the ratio {eq}\rm \dfrac {\left [HPO_4^{2-}\right ]}...
Before we can sum all of the molar mass of the elements in acetic acid we need the chemical formula of acetic acid. Acetic acid's chemical formula is...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question Our experts can ...
Given: Mass of diprotic acid sample 0.117 g Concentration of NaOH 0.0500 M What are the moles of diprotic acid, H_2X present? What is the molar mass of the diprotic acid? The NaOH solution with a concentration of 0.188 M is used to titrate a diprotic acid of unkno...
小明希望用稀硫酸和锌粒反应来制取氢气，但实验室提供的是溶质质量分数为98%的浓硫酸．试计算：（1）将10g浓硫酸配制成溶质质量分数为19.6%的稀硫酸，需要加水多少克？___（2）取上述配制好的溶质质量分数为19.6%的稀硫酸20g与足量锌粒充分反应，能制得氢气质量为多少克？___（3）充分反应后所得溶液中溶质...
It's years ___I enjoyed myself so much.有一磷酸盐溶液，可能由Na3P04、Na2HPO4、NaH2PO4或其中二者的混合物组成，今以百里酚酞为指示剂，用盐酸标准滴定溶液滴定至终点时消耗V1mL,再加入甲基红指示剂,继续用盐酸标准滴定溶液滴定至终点时又消耗V2mL。当V2>V1,V1>0时，溶液的组成为()。
What is the pH of a solution containing 0.250 M HONH 2 and 0.400 M HONH 3 Cl? (K b for HONH 2 is 1.1 x 10 -8 .) a) 7.75 b) 8.16 c) 5.84 d) 6.25 e) 12.73 14. A 150.0 mL buffer solution containing 0.100 M hydrocyanic acid (HCN, K a = 6.2 x 10 -10 ) and 0.100 ...
mL NaOH added will show an inflection point at the equivalence point. The size of the inflection point depends on the Ka of the acid. If the acid is too weak, this change is so small that it may not be seen. In part I of this experiment, acetic acid (a monoprotic acid) will ...
1 A key challenge that prevents its development into a practical technology is the availability of efficient and inexpensive photoactive materials.2 Given the considerations of light absorption, charge separation, charge transfer, and stability, the issues that limit the performance of photoactive ...
Which is the stronger acid: (CH_{3})_{2}OH or (CH_{3})_{2}NH Which one of the following is the weakest acid? a) HF(Ka = 6.8 x 10-4) b) HClO(Ka = 3.0 x 10-8) c) HNO2(Ka = 4.5 x 10-4) d) HCN(Ka = 4.9 x 10-10) e) Acetic acid, CH3CO2H (Ka = 1.8 x...