Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u).
Enter a valid molecular formula and press the calculate button to determine the correct molar mass. Atomic mass values for individual elements can be obtained from the Periodic Table of the Elements. Results are expressed in terms of grams/mol.
分子式输入
常用分子式示例
计算结果
输入分子式开始计算
This molarity calculator is a tool for converting the mass concentration of any solution to molar concentration (or recalculating grams per ml to moles). You can also calculate the Mass, Volume or Concentration required for a solution:
mass of a compound required to prepare a solution of known volume and concentration,
volume of solution required to dissolve a compound of known mass to a desired concentration,
concentration of a solution resulting from a known mass of compound in a specific volume.
mass of a compound required to prepare a solution of known volume and concentration,
volume of solution required to dissolve a compound of known mass to a desired concentration,
concentration of a solution resulting from a known mass of compound in a specific volume.
参数输入
输入任意两个值和分子量，自动计算第三个值
计算结果
输入参数开始计算
计算公式
n = m / M
C = n / V
∴ C = m / (M × V)
Calculate the dilution required to prepare a stock solution. The dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
稀释参数
C₁V₁ = C₂V₂ · 填入三个值计算第四个
起始溶液 (母液)
最终溶液 (工作液)
计算结果
输入参数开始计算
连续稀释
In Vivo Dissolution Calculator can automatically calculates the dosage, administration volume, total dosage and concentration for a single animal, supports laboratory animals such as mice and rats, and is suitable for pharmacological and toxicological studies.
实验参数
溶剂比例 (%)
配方结果
输入实验参数开始计算
The pH value is an essential factor in chemistry, medicine, and daily life. With this pH calculator, you can determine the pH of a solution in a few ways. It can convert pH to H+, as well as calculate pH from the ionization constant and concentration.
Our calculator may ask you for the concentration of the solution. If you don't know, you can calculate it using our concentration calculator. You can also use the solution dilution calculator to calculate the concentration of ions in a diluted solution.
pH计算参数
计算结果
输入参数开始计算
pH 标尺参考
0
2
4
6
7
8
10
12
14
酸性
中性
碱性
计算原理
弱酸: Ka = [H⁺][A⁻]/[HA]
弱碱: Kb = [OH⁻][BH⁺]/[B]
pH = -log₁₀[H⁺]
pH + pOH = 14 (25°C)