缓冲溶液(Buffer solution)是指能够将溶液中的酸度或碱度维持在一定稳定范围内的溶液,其中包含质子或氢氧根的浓度可以在一定范围内变化而不引起酸碱度显著变化的一种溶液。 氨水和氯化铵是一种常见的缓冲系统。这种缓冲溶液的pH值通常在8.5左右,可用于生物化学和分析化学中的实验。 缓冲原理 氨水和氯化铵的缓冲原理是在...
Colon cells are subjected to high concentrations of NH3 and NH4 +, and a sizeable portion of this buffer is absorbed. The flux of these components into cells causes opposite effects on their pH; this effect is largely used to induce an acid load and to observe the mechanism of acid ...
To prepare a buffer of pH 10.5, which buffer system listed below is the best? A、 CH3NH2·HCl —CH3NH2 (pKa =10.65) B、NH3·H2O —NH4Cl (pKa =9.25) C、Na3PO4 —Na2HPO4 (pKa3 = 12.32) D、H2CO3—NaHCO3 (pKa1=6.37) 点击查看答案 你可能感兴趣的试题 单项选择题 关于反移情的原...
A NaHCO3-Na2CO3 B NaCL-NaOH C NH3-NH4CL D HAc-NaAc 相关知识点: 试题来源: 解析 B缓冲溶液(英文:buffer solution)是一种能在加入少量酸或碱和水时大大减低pH变动的溶液.常用作缓冲溶液的酸类由弱酸及其共轭酸盐组合成的溶液具有缓冲作用结果一 题目 下列各组按等物质的量混合配制成溶液后,其中不是缓冲...
A NaHCO3-Na2CO3 B NaCL-NaOH C NH3-NH4CL D HAc-NaAc 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 B缓冲溶液(英文:buffer solution)是一种能在加入少量酸或碱和水时大大减低pH变动的溶液.常用作缓冲溶液的酸类由弱酸及其共轭酸盐组合成的溶液具有缓冲作用 解析看不懂?免费查看同类...
Determine the pH of a 1.0 M solution of NH_4C1. The Kb of NH_3 is 1.8 x 10^-5. What is the pH of a buffer solution that is 0.200 M NH3 and 0.300 M NH4Cl? The Kb of ammonia is 1.80 x 10-5. What would be the pH of a 0.563 M so...
In order to keep the pH of the solution stable, which buffer system listed below is the best? A、0.1mol·L-1 HAc — 0.1mol·L-1 NaAc (pKa = 4.75) B、0.1mol·L-1 NH3·H2O — 0.1mol·L-1 NH4Cl (pKb = 4.75) C、 0.1mol·L-1 NaH2PO4 — 0.1mol·L-1 Na2HPO4(pKa2=7.21 ) ...
A catalytic action of both NH4Cl and Pt, for example, for the formation of alkali- and alkaline-earth metal amides from liquid ammonia is well established [11]. 2.1. Crystal Structure Description [Zn2(NH3)2(NH2)3]Cl crystallizes in the chiral space group P21212 with two formula units in...
What is the pH of a 0.230M solution of methylamine (CH_3NH_2)? What is the pH of a 0.26 M solution of methylamine (CH_3NH_2)? K_b =4.4 �x 10^-4 Find the pH of a buffer that consists of 0.19 M CH_3NH_2 and 0.53 M CH_3NH_3Cl (pKb of CH_3NH_...
A NaHCO3-Na2CO3 B NaCL-NaOH C NH3-NH4CL D HAc-NaAc 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 B缓冲溶液(英文:buffer solution)是一种能在加入少量酸或碱和水时大大减低pH变动的溶液.常用作缓冲溶液的酸类由弱酸及其共轭酸盐组合成的溶液具有缓冲作用 解析看不懂?免费查看同类...