Iron reacts with oxygen. Different masses of iron are burned...

Iron reacts with oxygen. Different masses of iron are burned in a constant amount of oxygen. The product, an oxide of iron, is weighed. The graph below is obtained when the mass of product used is plotted against the mass of iron used. Graph can't copy (a) How many grams of product are obtained when 0.50 g of iron is used? (b) What is the limiting reactant when 2.00 g of iron is used? (c) What is the limiting reactant when 5.00 g of iron is used? (d) How many grams of iron react exactly with the amount of oxygen supplied? (e) What is the simplest formula of the product?

Iron reacts with oxygen. Different masses of iron are burned in a constant amount of oxygen. The product, an oxide of iron, is weighed. The graph below is obtained when the mass of product used is plotted against the mass of iron used.
Graph can't copy
(a) How many grams of product are obtained when 0.50 g of iron is used?
(b) What is the limiting reactant when 2.00 g of iron is used?
(c) What is the limiting reactant when 5.00 g of iron is used?
(d) How many grams of iron react exactly with the amount of oxygen supplied?
(e) What is the simplest formula of the product?

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Stoichiometry

Stoichiometry involves using balanced chemical equations to quantitatively relate the amounts of reactants and products in a chemical reaction. It requires converting between masses and moles, applying mole ratios, and ensuring that the conservation of mass is maintained throughout the reaction.

Limiting Reactant

The limiting reactant is the chemical ingredient that is entirely consumed first in a reaction, thereby determining the maximum possible amount of product that can be formed. Identifying the limiting reactant is crucial for accurately calculating theoretical yields.

Graphical Analysis

Graphical analysis in chemical reactions involves interpreting plots that relate quantities of reactants and products. Such graphs help in visualizing trends, identifying linear relationships, and determining reaction thresholds, such as the point at which one reactant is fully consumed.

Empirical Formula Determination

Empirical formula determination is the method used to deduce the simplest whole-number ratio of the elements present in a compound. This process generally involves converting experimental mass data to moles and then simplifying the ratios to reveal the basic chemical formula of the compound.

Transcript

00:01 Okay, so before we try to answer some of these questions, where the graph is going up, okay? you can see that as i add more iron, i make more product.

00:12 Okay, so this section, the iron is the limiting reactant.

00:18 And then there's going to be a point of the graph that levels off.

00:22 So no matter how much iron i add, i don't make any more product.

00:26 So the other reactant must be our limiting reactant.

00:29 So that's our oxygen gas.

00:32 That's our limiting reactant in that section.

00:35 So now that we've kind of clarified what the graph means, we'll see if we can answer a question.

00:40 So how many grams of product would i get if i use 0 .5 grams of iron? well, you're just going to have to estimate.

00:46 So go over to about 0 .5 and up and back, and you're going to get about 0 .75 grams of your product.

00:56 Okay? it's going to be an estimate, though.

00:59 What's the limiting reactant? when i use two grams.

01:03 Well, if when i use two grams, i'm on the slanted up thing.