Hydrogen is displaced from water by using metals that are more reactive than hydrogen. These metals may include potassium, sodium and lithium.This reaction is exothermic meaning a lot of heat is production during the reaction.
jim items answered the question on February 22, 2019 at 17:15
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9.7 g of a mixture of Potassium hydroxide and Potassium chloride was dissolved to make one litre solution.20.0cm3 of this solution required 25.0cm3 of 0.12M hydrochloric acid for completed neutralization. Calculate the percentage by mass of Potassium chloride.(K=39.0,Cl= 35.5)
Date posted: February 18, 2019. Answers (1)
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25.0cm3 of a mixture of Fe2+ and Fe3+ ions in an aqueous salt was acidified with sulphuric(VI)acid then titrated against potassium manganate(VI).The salt required 15cm3 of 0.02M potassium manganate(VI) for complete reaction.
A second 25cm3 portion of the Fe2+ and Fe3+ ion salt was reduced by Zinc then titrated against the same concentration of potassium manganate(VI).19.0cm3 of potassium manganate(VI)solution was used for complete reaction. Calculate the concentration of Fe2+ and Fe3+ ion in the solution on moles per litre.
Date posted: February 18, 2019. Answers (1)
- 46.0g of a metal carbonate MCO3 was dissolved 160cm3 of 0.1M excess hydrochloric acid and the resultant solution diluted to one litre.25.0cm3 of this solution...(Solved)
46.0g of a metal carbonate MCO3 was dissolved 160cm3 of 0.1M excess hydrochloric acid and the resultant solution diluted to one litre.25.0cm3 of this solution required 20.0cm3 of 0.1M sodium hydroxide solution for
complete neutralization. Calculate the atomic mass of "M"
Date posted: February 18, 2019. Answers (1)
- A certain carbonate, GCO3, reacts with dilute hydrochloric acid according to the equation given below
If 1 g of the carbonate reacts completely with 20 cm3...(Solved)
A certain carbonate, GCO3, reacts with dilute hydrochloric acid according to the equation given below
If 1 g of the carbonate reacts completely with 20 cm3 of 1 M hydrochloric acid ,calculate the relative atomic mass of G (C = 12.0 = 16.0)
Date posted: February 18, 2019. Answers (1)
- 20.0cm3 of 0.05 M acidified potassium manganate(VII)solution oxidized 25.0cm3 of Fe2+(aq) ions in 40.0g/l of impure Iron (II)sulphate(VI) to Fe3+(aq) ions. Calculate the percentage impurities...(Solved)
20.0cm3 of 0.05 M acidified potassium manganate(VII)solution oxidized 25.0cm3 of Fe2+(aq) ions in 40.0g/l of impure Iron (II)sulphate(VI) to Fe3+(aq) ions. Calculate the percentage impurities in the Iron (II)sulphate(VI).
Date posted: February 18, 2019. Answers (1)
- You are provided with:
(i)sodium L containing 5.0g per litre of a dibasic organic acid H2X.2H2O.
(ii)solution M which is acidified potassium manganate(VII)
(iii)solution N a mixture of...(Solved)
You are provided with:
(i)sodium L containing 5.0g per litre of a dibasic organic acid H2X.2H2O.
(ii)solution M which is acidified potassium manganate(VII)
(iii)solution N a mixture of sodium ethanedioate and ethanedioic acid
(iv) 0.1M sodium hydroxide solution P
(v) 1.0M sulphuric(VI)
You are required to:
(i)standardize solution M using solution L
(ii)use standardized solution M and solution P to determine the % of sodium ethanedioate in the mixture
Date posted: February 18, 2019. Answers (1)
- You are provided with:
(i)an impure calcium carbonate labeled M
(ii)Hydrochloric acid labeled solution N
(iii)solution L containing 20g per litre sodium hydroxide(Solved)
You are provided with:
(i)an impure calcium carbonate labeled M
(ii)Hydrochloric acid labeled solution N
(iii)solution L containing 20g per litre sodium hydroxide
You are required to determine the concentration of N in moles per litre and the % of calcium carbonate in mixture M.
Date posted: February 18, 2019. Answers (1)
- You are provided with: Acidified Potassium Manganate (VII) solution A, 0.1M of an iron (II) salt solution B....
(Solved)
You are provided with:
Date posted: February 15, 2019. Answers (1)
- Calculate the molarity of a solution containing 4.0 g sodium hydroxide dissolved in 500 cm3 solution(Solved)
Calculate the molarity of a solution containing 4.0 g sodium hydroxide dissolved in 500 cm3 solution
Date posted: February 15, 2019. Answers (1)
- 100 cm3 of nitrogen (II)oxide NO combine with 50 cm3 of Oxygen to form 100 cm3 of a single gaseous compound of nitrogen. All volumes...(Solved)
100 cm3 of nitrogen (II)oxide NO combine with 50 cm3 of Oxygen to form 100 cm3 of a single gaseous compound of nitrogen. All volumes measured at the same temperature and pressure. Obtain the equation for the reaction and name the gaseous product
Date posted: February 15, 2019. Answers (1)
- 1.0g of an alloy of aluminium and copper were reacted with excess hydrochloric acid. If 840 cm3 of hydrogen at s.t.p was produced, calculate the...(Solved)
1.0g of an alloy of aluminium and copper were reacted with excess hydrochloric acid. If 840 cm3 of hydrogen at s.t.p was produced, calculate the % of copper in the alloy.(Al =27.0,one mole of a gas at s.t.p =22.4 dm3 )
Date posted: February 15, 2019. Answers (1)
- Calculate the volume of carbon(IV)oxide at r.t.p produced when 5.0 g of calcium carbonate is strongly heated.(Ca=40.0, C= 12.0,O = 16.0,1 mole of gas =22.4...(Solved)
Calculate the volume of carbon(IV)oxide at r.t.p produced when 5.0 g of calcium carbonate is strongly heated.(Ca=40.0, C= 12.0,O = 16.0,1 mole of gas =22.4 at r.t.p)
Date posted: February 15, 2019. Answers (1)
- Calculate the number of particles present in 0.135 g of a gaseous hydrocarbon X on complete combustion produces 0.41g of carbon(IV)oxide and 0.209g of water.0.29g...(Solved)
Calculate the number of particles present in 0.135 g of a gaseous hydrocarbon X on complete combustion produces 0.41g of carbon(IV)oxide and 0.209g of water.0.29g of X occupy 120cm3 at room temperature and 1 atmosphere pressure .Name X and draw its molecular structure.(C=12.0,O= 16.O,H=1.0,1 mole of gas occupies 24dm3 at r.t.p)
Date posted: February 15, 2019. Answers (1)
- A compound of carbon, hydrogen and oxygen contain 54.55% carbon, 9.09% and remaining 36.36% oxygen.
If its relative molecular mass is 88, determine its molecular formula(C=12.0,...(Solved)
A compound of carbon, hydrogen and oxygen contain 54.55% carbon, 9.09% and remaining 36.36% oxygen.
If its relative molecular mass is 88, determine its molecular formula(C=12.0, H =1.0, O= 16.0)
Date posted: February 15, 2019. Answers (1)
- A hydrocarbon was found to contain 92.3% carbon and the remaining Hydrogen. If the molecular mass of the compound is 78, determine the molecular formula(C=12.0,...(Solved)
A hydrocarbon was found to contain 92.3% carbon and the remaining Hydrogen. If the molecular mass of the compound is 78, determine the molecular formula(C=12.0, H =1.0)
Date posted: February 15, 2019. Answers (1)
- 1.60g of an oxide of Magnesium contain 0.84g by mass of Magnesium.
Determine its empirical formula(Mg = 24.0, 16.0)(Solved)
1.60g of an oxide of Magnesium contain 0.84g by mass of Magnesium.
Determine its empirical formula(Mg = 24.0, 16.0)
Date posted: February 15, 2019. Answers (1)