Use of amount of substance in relation to masses of pure substances

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Question 24
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Figure 1 shows the volumes of:

  • sodium thiosulfate solution of concentration 0.15 mol/dm30.15\text{ mol/dm}^30.15 mol/dm3
  • hydrochloric acid of concentration 0.10 mol/dm30.10\text{ mol/dm}^30.10 mol/dm3

which completely react to produce different masses of sulfur.

A line graph plotting the mass of sulfur produced in grams on the y-axis (ranging from 0.00 to 0.60 in steps of 0.05) against the volume of reactant in cubic centimeters on the x-axis (ranging from 0 to 500 in steps of 50). A dashed line represents the 0.15 mol/dm^3 sodium thiosulfate solution, which starts at (0, 0) and goes linearly to (100, 0.48). A solid line represents the 0.10 mol/dm^3 hydrochloric acid, which starts at (0, 0) and goes linearly to (300, 0.48).

Determine the simplest whole number ratio of the volumes of:

sodium thiosulfate solution:hydrochloric acid\text{sodium thiosulfate solution} : \text{hydrochloric acid}sodium thiosulfate solution:hydrochloric acid

which completely react with each other. Use Figure 1.

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Use of amount of substance in relation to masses of pure substances Questions

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