💯 Reactions of Metals with Various Oxygen (questions) Watch this video to find out!
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Question 14
List two metals that could be used for pipes to transfer dilute sulphuric acid in a chemical factory.
Cu, Ag and Pt ↙
Question 15
Which metals react with cold dilute hydrochloric acid but not cold water? Explain this difference in reactivity.
Magnesium, aluminium, zinc, chromium, iron, cadmium, cobalt, nickel and tin.
The valence electrons are held onto tightly and the energy necessary to release them is provided by the reduction of hydrogen in HCl, but not by the reduction of hydrogen in water. ↙
Question 16
Based on the observations in the above table, deduce the order of activity of the four metals tested, starting with the most active of metals.
calcium, magnesium, zinc, copper ↙
Question 17
Write general equations for the action on metals of:
(a) Dilute acid
metal + acid = hydrogen + salt ↙
(b) Water
metal + water = hydrogen + hydroxide ↙
(c) Oxygen
metal + oxygen = metal oxide ↙
Question 18
Write word and balanced formula equations for the action of dilute sulphuric acid on:
(a) Calcium
calcium + sulfuric acid = calcium sulfate hydrogen
Ca(s) + H2SO4(aq) = CaSO4 + H2(g) ↙
(b) Potassium
potassium + sulfuric acid = potassium sulfate + hydrogen
2K(s) + H2SO4(aq) = K2SO4(aq) + H2(g) ↙
Question 19
Write word and balanced formula equations for the action of oxygen (combustion) on:
(a) Sodium
sodium + oxygen = sodium oxide
4Na(s) +O2(g) = 2Na2O(s) ↙
(b) Magnesium
magnesium + oxygen = magnesium oxide
2Mg(s) + O2(g) = 2MgO(s) ↙
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Question 14
List two metals that could be used for pipes to transfer dilute sulphuric acid in a chemical factory.
Cu, Ag and Pt ↙
Question 15
Which metals react with cold dilute hydrochloric acid but not cold water? Explain this difference in reactivity.
Magnesium, aluminium, zinc, chromium, iron, cadmium, cobalt, nickel and tin.
The valence electrons are held onto tightly and the energy necessary to release them is provided by the reduction of hydrogen in HCl, but not by the reduction of hydrogen in water. ↙
Question 16
Based on the observations in the above table, deduce the order of activity of the four metals tested, starting with the most active of metals.
calcium, magnesium, zinc, copper ↙
Question 17
Write general equations for the action on metals of:
(a) Dilute acid
metal + acid = hydrogen + salt ↙
(b) Water
metal + water = hydrogen + hydroxide ↙
(c) Oxygen
metal + oxygen = metal oxide ↙
Question 18
Write word and balanced formula equations for the action of dilute sulphuric acid on:
(a) Calcium
calcium + sulfuric acid = calcium sulfate hydrogen
Ca(s) + H2SO4(aq) = CaSO4 + H2(g) ↙
(b) Potassium
potassium + sulfuric acid = potassium sulfate + hydrogen
2K(s) + H2SO4(aq) = K2SO4(aq) + H2(g) ↙
Question 19
Write word and balanced formula equations for the action of oxygen (combustion) on:
(a) Sodium
sodium + oxygen = sodium oxide
4Na(s) +O2(g) = 2Na2O(s) ↙
(b) Magnesium
magnesium + oxygen = magnesium oxide
2Mg(s) + O2(g) = 2MgO(s) ↙
8 ماه پیش
در تاریخ 1402/08/13 منتشر شده
است.
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