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Add excess copper to nitric (IV) acid and filter the mixture. Add excess Na2CO3 solution to the filtrate and filter to obtain the residue of copper (ii) carbonate
john3 answered the question on October 5, 2017 at 11:33
- What observation will be made when a few drops of concentrated sulphuric (VI) acid are added to crystals of sugar? Explain your answer (Solved)
What observation will be made when a few drops of concentrated sulphuric (VI) acid are added to crystals of sugar? Explain your answer
Date posted: October 4, 2017. Answers (1)
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Explain one way in which sulphur (IV) oxide is a pollutant
Date posted: October 4, 2017. Answers (1)
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The molar enthalpy of neutralisation between hydrochloric acid and ammonia solution was found to be -52.2 kj mol4, while that of hydrochloric acid and sodium hydroxide was 57.1 kJ mol-1. Explain the difference in these values.
Date posted: October 4, 2017. Answers (1)
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Date posted: October 4, 2017. Answers (1)
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Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was reacted with water. (Molar gas volume at room temperature is 24 dm3, Relative atomic mass of M = 7).
Date posted: October 4, 2017. Answers (1)
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A solution was made by dissolving 8.2g of calcium nitrate to give 2 litres of solution. (Ca = 40.0; N = 14.0; O = 16.0).
Determine the concentration of nitrate ions in moles per litre
Date posted: October 4, 2017. Answers (1)
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When 15cm^3 of a gaseous hydrocarbon, P, was burnt in 100cm^3 of oxygen, the resulting gaseous mixture occupied 70cm^3 at room temperature and pressure. When the gaseous mixture was passed through potassium hydroxide solution, its volume decreased to 25cm^3.
(a) What volume of oxygen was used during the reaction?
Date posted: October 4, 2017. Answers (1)
- Name one alloy of copper and state its use.
Alloy
Use(Solved)
Name one alloy of copper and state its use.
Alloy
Use
Date posted: October 4, 2017. Answers (1)
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Name two ores from which copper is extracted
Date posted: October 4, 2017. Answers (1)
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A certain mass of gas occupies 146 dm^3 at 291 K and 98.31 kPa. What will be its temperature if its volume is reduced to 133 dm^3 at 101.325 kPa?
Date posted: October 4, 2017. Answers (1)
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Date posted: October 3, 2017. Answers (1)
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paper two.
Date posted: October 2, 2017. Answers (1)
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Date posted: October 2, 2017. Answers (1)
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Date posted: October 2, 2017. Answers (1)
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Give a reason why nitric (V) acid is stored in dark brown bottles.
Date posted: September 30, 2017. Answers (1)
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State one use of sodium carbonate
Date posted: September 30, 2017. Answers (1)
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What is meant by the term dynamic equilibrium?
Date posted: September 29, 2017. Answers (1)
- a) Name the following processes (i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.(ii) When sodium carbonate decahydrate crystals...(Solved)
a) Name the following processes:
i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.
ii) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned
into powder.
Date posted: September 29, 2017. Answers (1)
- What compounds form when hot concentrated sodium hydroxide is used instead of the cold
dilute sodium hydroxide.(Solved)
What compounds form when hot concentrated sodium hydroxide is used instead of the cold
dilute sodium hydroxide.
Date posted: September 29, 2017. Answers (1)
- Explain why the error in the Dalton's theory has not affected its validity?(Solved)
Explain why the error in the Dalton's theory has not affected its validity?
Date posted: September 29, 2017. Answers (1)