Stoichiometry Calculator
The Stoichiometry Calculator uses mole ratios from balanced chemical equations to determine the amounts of reactants and products. Calculate theoretical yield, identify limiting reagents, and convert between moles, grams, and liters for any reaction.
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What is Stoichiometry?
Stoichiometry is the calculation of quantities in chemical reactions based on balanced equations. The coefficients in a balanced equation give the mole ratio — for 2H₂ + O₂ → 2H₂O, the ratio is 2:1:2, meaning 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water.
Stoichiometric calculations are essential in chemistry for determining how much reagent is needed, predicting product yields, identifying limiting reagents, and calculating percent yield. The mole ratio is the bridge between reactants and products.
प्रयुक्त सूत्र और समीकरण
यह Stoichiometry Calculator ५ मुख्य समीकरणों का उपयोग करता है:
1 Mole Ratio Conversion ▼
For 2H₂ + O₂ → 2H₂O: 3 moles H₂ produces 3 × (2/2) = 3 moles H₂O.
2 Moles from Grams ▼
36 grams of water (H₂O, MW=18): Moles = 36 / 18 = 2 moles.
3 Theoretical Yield ▼
Determines the maximum possible product from the limiting reagent.
इस कैलकुलेटर का उपयोग कैसे करें
इस अनुपात कैलकुलेटर का उपयोग करने के लिए, इन ३ चरणों का पालन करें:
मान दर्ज करें
इनपुट फ़ील्ड में ज्ञात अनुपात मान टाइप करें। एक फ़ील्ड खाली छोड़ दें — यह वही अज्ञात मान है जिसे अनुपात कैलकुलेटर हल करेगा।
मोड चुनें
अनुपात मोड चुनें — हल करें, सरल करें, या स्केल करें। प्रत्येक मोड आपके इनपुट मानों पर अलग-अलग समीकरण लागू करता है।
परिणाम प्राप्त करें
गणना करें (Calculate) पर क्लिक करें। परिणाम स्क्रीन एक दृश्य अनुपात पट्टी, पाई चार्ट और चरण-दर-चरण समाधान के विवरण के साथ उत्तर प्रदर्शित करती है।
उदाहरण समस्याएं और चरण-दर-चरण समाधान
इस अनुपात कैलकुलेटर का उपयोग करके चरण-दर-चरण समाधान के साथ ३ उदाहरण समस्याएं नीचे दी गई हैं:
इनपुट 1 How much O₂ needed to react with 4 moles H₂?
इनपुट 2 Theoretical yield from 10g CH₄ burning in excess O₂
इनपुट 3 Find limiting reagent: 5 mol H₂ and 4 mol O₂
अक्सर पूछे जाने वाले प्रश्न (FAQ)
What is a mole ratio? ▼
A mole ratio is the ratio of coefficients in a balanced equation. For N₂ + 3H₂ → 2NH₃, the mole ratios are N₂:H₂ = 1:3, H₂:NH₃ = 3:2, and N₂:NH₃ = 1:2.
What is a limiting reagent? ▼
The limiting reagent is the reactant that runs out first, determining the maximum product yield. The other reactant is 'in excess.' Identify it by dividing each reactant's moles by its coefficient — the smallest quotient is the limiting reagent.
How do you calculate percent yield? ▼
Percent Yield = (Actual Yield / Theoretical Yield) × 100. If you expected 50g of product but obtained 42g: Percent Yield = (42/50) × 100 = 84%.
Why must chemical equations be balanced for stoichiometry? ▼
Balanced equations obey the law of conservation of mass — atoms are neither created nor destroyed. Unbalanced equations give incorrect mole ratios and wrong calculations.
How do you convert between moles and grams? ▼
Multiply moles by molar mass to get grams. Divide grams by molar mass to get moles. Example: 3 moles of NaCl (MW=58.44) = 3 × 58.44 = 175.3 grams.