Chemistry
Molarity = number of moles per litre
Unit of molarity = moles per litre (mol/L)
Molarity Calculator | SaitechAI
html + javascript for molarity calculator
Practice coding:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Molarity Calculator | SaitechAI</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 30px;
background: #f9f9f9;
}
h2 {
color: #006400;
text-align: center;
}
.calculator {
max-width: 400px;
margin: auto;
padding: 20px;
background: white;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0,0,0,0.2);
}
label {
font-weight: bold;
}
input {
width: 100%;
padding: 8px;
margin: 8px 0 16px 0;
border: 1px solid #ccc;
border-radius: 5px;
}
button {
background-color: #006400;
color: white;
padding: 10px;
border: none;
border-radius: 5px;
cursor: pointer;
width: 100%;
font-size: 16px;
}
button:hover {
background-color: #004d00;
}
#result {
margin-top: 15px;
font-weight: bold;
text-align: center;
color: #333;
}
</style>
</head>
<body>
<h2>Molarity Calculator | SaitechAI</h2>
<div class="calculator">
<label for="weight">Weight of solute (g):</label>
<input type="number" id="weight" step="0.01" placeholder="Enter grams">
<label for="mol_weight">Molecular weight (g/mol):</label>
<input type="number" id="mol_weight" step="0.01" placeholder="Enter g/mol">
<label for="volume">Volume of solution (mL):</label>
<input type="number" id="volume" step="0.01" placeholder="Enter mL">
<button onclick="calculateMolarity()">Calculate Molarity</button>
<div id="result"></div>
</div>
<script>
function calculateMolarity() {
let weight = parseFloat(document.getElementById('weight').value);
let molWeight = parseFloat(document.getElementById('mol_weight').value);
let volume = parseFloat(document.getElementById('volume').value);
if (isNaN(weight) || isNaN(molWeight) || isNaN(volume) || molWeight <= 0 || volume <= 0) {
document.getElementById('result').innerHTML = "⚠️ Please enter valid numbers.";
return;
}
let moles = weight / molWeight;
let volumeLiters = volume / 1000;
let molarity = moles / volumeLiters;
document.getElementById('result').innerHTML =
"Molarity of the solution = <b>" + molarity.toFixed(4) + " mol/L</b>";
}
</script>
</body>
</html>
Python code
def calculate_molarity(weight_solute, mol_weight, volume_ml):
moles = weight_solute / mol_weight
volume_liters = volume_ml / 1000
molarity = moles / volume_liters
return molarity
weight = float(input("Enter weight of solute (g): "))
mol_weight = float(input("Enter molecular weight of solute (g/mol): "))
volume = float(input("Enter volume of solution (mL): "))
M = calculate_molarity(weight, mol_weight, volume)
print(f"Molarity of the solution = {M:.4f} mol/L")
Molarity Calculator developed using Python
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