Technical Specification: Chemistry Titration Curve Generator

Overview

The Chemistry Titration Curve Generator is a client-side, browser-based tool designed to help chemistry students and researchers visualize titration curves. It calculates pH based on user-defined parameters and plots the resulting data in a professional, responsive chart.

Core Features

• Dynamic Simulation: Real-time calculation of pH based on analyte and titrant molarity, volume, and pKa/pKb values.
• Multi-protic Support: Ability to define multiple pKa values for complex acid/base reactions.
• Automated Analysis: Detection of equivalence points using numerical differentiation (first derivative).
• High-Resolution Export: Download the chart as a high-quality PNG image.
• Responsive UI: Fully functional on desktop and mobile browsers.

UI/UX Design

• Layout:
  • Header: Clean, minimalist title with a short description.
  • Main Area: Split screen design. Left sidebar (30% width) for input parameters; Right main view (70% width) for the interactive chart.
  • Responsive behavior: On small screens, the sidebar stacks above the chart.
• Color Palette:
  • Background: Off-white (#FAFAFA) for a clean, non-glaring look.
  • Primary: Deep Indigo (#4F46E5) for interactive elements and primary chart lines.
  • Secondary: Slate Grey (#64748B) for labels and supporting text.
  • Alert/Info: Emerald (#10B981) for equivalence point markers.
• Animations:
  • Smooth chart re-renders when inputs change (using CSS transitions for container resizing).
  • Subtle hover effects on input fields and buttons (scaling/box-shadow).

Technical Implementation Constraints

• Single File: All HTML, CSS, and JavaScript must be contained in one file. External assets (like Chart.js) must be linked via secure CDNs.
• Zero Persistence: NO usage of localStorage, sessionStorage, or cookies. The state is transient and resets on refresh.
• Performance: Calculations must be performed in the main thread without blocking, ensuring smooth UI interactions.
• Sandboxing: Code must be compatible with a null-origin iframe environment (no calls to alert(), prompt(), etc.).
• Dependency Strategy: Use standard libraries (e.g., Chart.js) for graphing. Vanilla JS for all logic (calculating equilibrium constants, plotting logic).

Implementation Roadmap

1. Setup: Basic HTML5 boilerplate with CDN links for Chart.js and Tailwind CSS (via CDN).
2. State Management: A single state object holding current input values (molarity, volumes, etc.).
3. Calculation Engine: JS function to iterate through volume increments and compute pH based on the Henderson-Hasselbalch equation and chemical equilibrium constants.
4. Graph Rendering: Chart.js configuration to draw the curve using the dataset generated by the calculation engine.
5. Equivalence Finder: Algorithm to iterate through the dataset, find the maximum slope (derivative), and plot a coordinate/marker on the chart.
6. Export: Logic to generate a Blob from the chart canvas to enable file downloads.