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14 天
为什么AR级别的Tris-HCL的价格更高?
AR级别,即分析纯级别,是化学试剂纯度的一种标准,要求杂质含量极低,确保在准确的科学实验中不产生干扰。高纯度的Tris-HCl意味着需要采用更为复杂的提纯工艺,如多次重结晶、离子交换层析等,以祛除可能存在的金属离子、有机杂质等,这些步骤增加了生产成本 ...
BBC
4 年
Concentrations and strengths of acids - Higher
If the hydrogen ion concentration in a solution increases by a factor of 10, the pH of the solution decreases by 1. A solution of 1 g/dm 3. hydrochloric acid has a pH of 1.6. Predict its pH when ...
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