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⚗️ 亨德森-哈塞尔巴尔赫方程（缓冲液 pH）Henderson-Hasselbalch Calculator
pH = pKa + log₁₀([A⁻]/[HA])；也可由目标 pH 反求所需的共轭碱/酸浓度比。本地处理。可设置「pKa」、「共轭碱 [A⁻] mol/L」、「弱酸 [HA] mol/L」、「目标 pH（可选）」。pH = pKa + log₁₀([A⁻]/[HA]); also gives the base/acid ratio needed for a target pH. Processed locally. Settings: pKa, Conjugate base [A⁻] mol/L, Weak acid [HA] mol/L, Target pH (optional).
使用说明与常见问题How-to & FAQ
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」是什么？What is the Henderson-Hasselbalch Calculator tool?
pH = pKa + log₁₀([A⁻]/[HA])；也可由目标 pH 反求所需的共轭碱/酸浓度比。本地处理。可设置「pKa」、「共轭碱 [A⁻] mol/L」、「弱酸 [HA] mol/L」、「目标 pH（可选）」。pH = pKa + log₁₀([A⁻]/[HA]); also gives the base/acid ratio needed for a target pH. Processed locally. Settings: pKa, Conjugate base [A⁻] mol/L, Weak acid [HA] mol/L, Target pH (optional).
如何使用「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」？How do I use the Henderson-Hasselbalch Calculator tool?
在「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」中，填写「pKa」、「共轭碱 [A⁻] mol/L」、「弱酸 [HA] mol/L」、「目标 pH（可选）」等参数，结果会随输入实时计算并显示在下方。In the Henderson-Hasselbalch Calculator: Fill in "pKa", "Conjugate base [A⁻] mol/L", "Weak acid [HA] mol/L", "Target pH (optional)"; results are recalculated instantly as you type.
碱性缓冲液？Basic buffers?
对 NH₄⁺/NH₃ 这类体系，用 NH₄⁺ 的 pKa（9.25）即可同样计算。For NH₄⁺/NH₃ use the pKa of NH₄⁺ (9.25) the same way.
能举个计算实例吗？Can you show a worked example?
例如在「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」中填 pKa = 4.76，共轭碱 [A⁻] mol/L = 0.2，弱酸 [HA] mol/L = 0.1，结果区显示：pH：5.061；[A⁻]/[HA]：2For example, entering pKa = 4.76, Conjugate base [A⁻] mol/L = 0.2, Weak acid [HA] mol/L = 0.1 in the Henderson-Hasselbalch Calculator gives: pH: 5.061; [A⁻]/[HA]: 2
哪些输入会被检查？Which inputs are validated?
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」会检查这些输入——「pKa」：必须填写；「共轭碱 [A⁻] mol/L」、「弱酸 [HA] mol/L」：必须填写，须大于 0；「目标 pH（可选）」：可留空；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Henderson-Hasselbalch Calculator checks its inputs — "pKa": required; "Conjugate base [A⁻] mol/L", "Weak acid [HA] mol/L": required, must be greater than 0; "Target pH (optional)": optional; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」的设置：「pKa」默认 4.76；「共轭碱 [A⁻] mol/L」默认 0.2；「弱酸 [HA] mol/L」默认 0.1；「目标 pH（可选）」可留空。每次生成结果都按当前设置处理。Settings in the Henderson-Hasselbalch Calculator — "pKa" default 4.76; "Conjugate base [A⁻] mol/L" default 0.2; "Weak acid [HA] mol/L" default 0.1; "Target pH (optional)" optional. The result always uses the current settings.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Henderson-Hasselbalch Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」免费吗？需要注册吗？Is the Henderson-Hasselbalch Calculator free? Do I need an account?
「亨德森-哈塞尔巴尔赫方程（缓冲液 pH）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Henderson-Hasselbalch Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.