This calculator helps you determine the rate of a chemical reaction based on the change in concentration of reactants or products over a specific time interval. The reaction rate is a measure of how quickly a chemical reaction proceeds. It can be expressed as the change in the amount (or concentration) of a reactant or product per unit of time.
function calculateReactionRate() {
var initialConcentration = parseFloat(document.getElementById("initialConcentration").value);
var finalConcentration = parseFloat(document.getElementById("finalConcentration").value);
var timeInterval = parseFloat(document.getElementById("timeInterval").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(initialConcentration) || isNaN(finalConcentration) || isNaN(timeInterval)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (timeInterval <= 0) {
resultDiv.innerHTML = "Time interval must be greater than zero.";
return;
}
// The rate of reaction is the change in concentration divided by the change in time.
// For a reactant, the concentration decreases, so we often express the rate as positive.
// Rate = – (Δ[Reactant]) / Δt
// Rate = – ([Final Concentration] – [Initial Concentration]) / [Time Interval]
// Rate = ([Initial Concentration] – [Final Concentration]) / [Time Interval]
var changeInConcentration = initialConcentration – finalConcentration;
var reactionRate = changeInConcentration / timeInterval;
resultDiv.innerHTML = "Calculated Reaction Rate: " + reactionRate.toFixed(4) + " mol/(L·s)";
}
#reactionRateCalculator {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
}
#reactionRateCalculator h2 {
text-align: center;
margin-bottom: 20px;
color: #333;
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.input-section {
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.input-section input[type="number"] {
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button:hover {
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#result {
margin-top: 20px;
text-align: center;
font-size: 1.1em;
color: #333;
}