极量计算器
解决溶液的摩尔性、质量、摩尔质量或体积。
输入结果时更新 。
关于此计算器
Molarity is the most common way chemists express concentration: the number of moles of solute dissolved per litre of solution, M = moles / litres, with units of mol/L (also written M). The moles of solute come from its mass divided by its molar mass, moles = mass ÷ molar mass, so the full relationship ties together mass, molar mass, volume and concentration. This calculator solves for any one of molarity, mass of solute, solution volume or molar mass, and accepts the volume in litres or millilitres.
As a worked example, dissolving 58.44 g of table salt (NaCl, molar mass ≈ 58.44 g/mol) in enough water to make 1 litre gives 58.44 / 58.44 = 1 mole in 1 L, a 1 M solution. Dissolve 117 g of NaCl instead and you have 2 moles, which in 1 L is a 2 M solution or, in 500 mL, a 4 M solution. Working backwards, to make 250 mL of 0.1 M NaCl you need 0.1 × 0.25 = 0.025 mol, i.e. 0.025 × 58.44 ≈ 1.46 g.
Molarity is the working currency of the lab bench — preparing standard solutions, diluting stock reagents, running titrations and stoichiometry, and mixing buffers all depend on it. Note that it is defined per litre of final solution, not per litre of solvent, so you dissolve the solute and then top up to the target volume rather than adding it to a pre-measured litre of water.
经常问到的问题
什么是摩尔蒂?
Molarity (M) is moles of solute per litre of solution. Dissolving 58.44 g of NaCl (1 mole) in 1 litre gives a 1 M solution.
我怎么从克到克得到内鬼?
以克数除以摩尔质量(克/摩尔)为单位。 NaCl 117克为117 / 58.44 = 2 摩尔。
目标的质量和体积需要多少?
摩尔需要=摩尔度x立方公升,然后质量=摩尔x摩尔质量。对于0.1 M NaCl 的250毫升,即0.1 ×0.25 = 0.025 毫升,大约1.46克。设置“溶解”到质量,让计算器进行计算。
是否每升水的摩尔度或每升溶液?
每升完成溶液。溶液溶解,然后将溶剂加到标记上,以达到目标体积——不要简单地将其加到一整升的水上,这样就会略为增加体积和降低浓度。
摩尔尼和摩尔尼有什么区别?
极性是每升溶液的摩尔, 并且随着温度的改变而变化, 因为体积的变化。 极性是每千克溶剂的摩尔, 且不依赖温度。 此工具计算摩尔性 。
我如何稀释股票解决方案?
Use C₁V₁ = C₂V₂: the moles stay constant, so concentration times volume before equals after. To make 1 L of 0.5 M from 2 M stock you need 0.5 × 1 / 2 = 0.25 L of stock topped up to 1 L.
API - 使用代码中的计算器
将此计算器称为自由 JSON 端点 。 不需要按键 。 将字段值发送到下面作为查询参数或 JSON 。 任何您省略的, 都会使用相同的默认值, 此页面预填的默认值是预填的; 未知参数是 400, 而不是静音零 。 读取 API 全部文件 →
终点
GET https://calculator.free/api/v1/molarity/curl
curl "https://calculator.free/api/v1/molarity/?solve=molarity&mass=58.44&molar_mass=58.44&volume=1"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/molarity/?" + new URLSearchParams({
"solve": "molarity",
"mass": "58.44",
"molar_mass": "58.44",
"volume": "1"
}));
const data = await r.json();
console.log(data.results);成果仅是一般指导的估计数,而不是财务、医疗或税务咨询。