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concentration calculations
Quiz
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
Huang Zhijie
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6 questions
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1.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
The concentration of a bottle of hydrochloric acid is 73 g/dm3. What is the mass of HCl in 2 dm3 of this bottle of acid?
2.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
14 g of potassium hydroxide was dissolved in water to form 0.1 dm3 of an aqueous solution. What was the concentration of this KOH solution in mol/dm3?
3.
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5 mins • 1 pt
80g of sodium hydroxide, NaOH, was dissolved in 1dm3 of water.
Calculate the concentration of the solution in mol/dm3
4.
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5 mins • 1 pt
4g of sodium hydroxide, NaOH, was dissolved in 250cm3 of water.
Calculate the concentration of the solution in mol/dm3.
5.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
CaCO3(s) --> CaO(s) + CO2(g)
Limestone (CaCO3) decomposes according to the equation above.
During the decomposition process, 3dm3 of carbon dioxide is collected. Calculate the mass of limestone decomposed.
6.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Hydrogen peroxide, H2O2, decomposes to give oxygen gas and water.
2H2O2(aq) --> 2H2O(l) + O2(g)
Given that 50cm3 of 2mol/dm3 of hydrogen peroxide is decomposed
calculate the volume of oxygen gas evolved in cm3
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