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SQA National 5 Chemistry Concentration and moles

Concentration and moles

This page covers the following topics:

The mole ratio is the ratio between the amount of moles in the compounds of a reaction. The mole ratio can be used as a conversion factor between reactants nd products, and can be worked out by looking at the coefficients in front of

Mole ratios

A solution formed when a solute dissolves in a solvent has a concentration which can be calculted by dividing the mass of dissolved dolute in g by the volume of the solution in dmΒ³ giving the concentration in g/dmΒ³.

Concentration

You can calculate the concentration in mol/dmΒ³ of a solution by calculating the moles and dividing by the volume of the solution.

Concentration and moles

1

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How many moles in 4.515 x 10Β²Β³ atoms of a substance?

SQA National 5 Chemistry Concentration and moles How many moles in 4.515 x 10Β²Β³ atoms of a substance?
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2

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What is the number of moles in 40g of Calcium?

SQA National 5 Chemistry Concentration and moles What is the number of moles in 40g of Calcium?
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3

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What is the mole ratio between Oβ‚‚ and Hβ‚‚O in this reaction: 2 Hβ‚‚ (g) + Oβ‚‚ (g) β†’ 2 Hβ‚‚O (g)?

SQA National 5 Chemistry Concentration and moles What is the mole ratio between Oβ‚‚ and Hβ‚‚O in this reaction: 2 Hβ‚‚ (g) + Oβ‚‚ (g) β†’ 2 Hβ‚‚O (g)?
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4

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What is the mole ratio between Hg(OH)β‚‚ and Hg₃(POβ‚„)β‚‚ in this reaction: 3 Hg(OH)β‚‚ + 2 H₃POβ‚„ β†’ Hg₃(POβ‚„)β‚‚ + 6 Hβ‚‚O ?

SQA National 5 Chemistry Concentration and moles What is the mole ratio between Hg(OH)β‚‚ and Hg₃(POβ‚„)β‚‚ in this reaction: 3 Hg(OH)β‚‚ + 2 H₃POβ‚„ β†’ Hg₃(POβ‚„)β‚‚ + 6 Hβ‚‚O ?
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5

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If 0.01 moles of CO are used in the following reaction: 4 CO + 9 Hβ‚‚ -> Cβ‚„H₁₀ + 4 Hβ‚‚O, how many moles of Cβ‚„H₁₀ are produced?

SQA National 5 Chemistry Concentration and moles If 0.01 moles of CO are used in the following reaction:  4 CO + 9 Hβ‚‚ -> Cβ‚„H₁₀ + 4 Hβ‚‚O, how many moles of Cβ‚„H₁₀ are produced?
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6

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Convert 0.08 kg into g.

SQA National 5 Chemistry Concentration and moles Convert 0.08 kg into g.
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7

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50 cmΒ³ dilute HCl contains 0.1 g dissolved hydrogen chloride. What is the concentration of the acid (in g/dmΒ³)?

SQA National 5 Chemistry Concentration and moles 50 cmΒ³ dilute HCl contains 0.1 g dissolved hydrogen chloride. What is the concentration of the acid (in g/dmΒ³)?
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8

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You are making a solution of HCl has a concentration of 8 g/dmΒ³. What is the volume of water you'd need to dissolve 0.002 kg NaOH in?

SQA National 5 Chemistry Concentration and moles You are making a solution of HCl has a concentration of 8 g/dmΒ³. What is the volume of water you'd need to dissolve 0.002 kg NaOH in?
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9

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0.5 mol of NaOH is dissolved in 2 dmΒ³ water. What is the concentration in mol/dmΒ³?

SQA National 5 Chemistry Concentration and moles 0.5 mol of NaOH is dissolved in 2 dmΒ³ water. What is the concentration in mol/dmΒ³?
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10

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100 cmΒ³ dilute HCl contains 0.5 g dissolved hydrogen chloride. What is the concentration of the acid in mol/dmΒ³?

SQA National 5 Chemistry Concentration and moles 100 cmΒ³ dilute HCl contains 0.5 g dissolved hydrogen chloride. What is the concentration of the acid in mol/dmΒ³?
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