https://padlet.com/subhoshree15/20219B Revision Hydrogen en-us 2021-09-08 10:03:29 UTC 2024-01-01 17:44:39 UTC hello@padlet.com subhoshree15 https://padlet.com/subhoshree15/20219B/wish/1724448114 2021-09-08 10:07:08 UTC https://padlet.com/subhoshree15/20219B/wish/1724448114 subhoshree15 https://padlet.com/subhoshree15/20219B/wish/1724453915 2021-09-08 10:10:55 UTC https://padlet.com/subhoshree15/20219B/wish/1724453915 subhoshree15 https://padlet.com/subhoshree15/20219B/wish/1724456871 2021-09-08 10:12:10 UTC https://padlet.com/subhoshree15/20219B/wish/1724456871 subhoshree15 https://padlet.com/subhoshree15/20219B/wish/1724458876 2021-09-08 10:13:24 UTC https://padlet.com/subhoshree15/20219B/wish/1724458876 krrishdeokarwebsites https://padlet.com/subhoshree15/20219B/wish/1753214116 Vapor and heat
Explosive reaction
Heat energy produced
Boiling water
Got diffused
Rigorous circular movement of sodium pellet]]> 2021-09-20 07:42:18 UTC https://padlet.com/subhoshree15/20219B/wish/1753214116 ericsohal2006 https://padlet.com/subhoshree15/20219B/wish/1753216426 the sodium melts and form a ball(sliver globule) that moves around .
It burns with red flames [ No red flame. Sodium burns with a golden yellow flame] till it disappears along with 
heat and hydrogen gas which are produced


]]> 2021-09-20 07:43:35 UTC https://padlet.com/subhoshree15/20219B/wish/1753216426 https://padlet.com/subhoshree15/20219B/wish/1753216855 a silver globule, burns with a golden yellow flame, vigorous, gas is produced]]> 2021-09-20 07:43:48 UTC https://padlet.com/subhoshree15/20219B/wish/1753216855 aashmangrewal https://padlet.com/subhoshree15/20219B/wish/1753217215 2021-09-20 07:44:00 UTC https://padlet.com/subhoshree15/20219B/wish/1753217215 krrishdeokarwebsites https://padlet.com/subhoshree15/20219B/wish/1753217518 White solution
Effervescence
Heating of solution]]> 2021-09-20 07:44:10 UTC https://padlet.com/subhoshree15/20219B/wish/1753217518 kavinmanas https://padlet.com/subhoshree15/20219B/wish/1753217743 When calcium reacts with water, it produces effervescence.

Hydrogen is being given off. It is exothermic

It reacts at room temperature]]> 2021-09-20 07:44:18 UTC https://padlet.com/subhoshree15/20219B/wish/1753217743 agrnika211 https://padlet.com/subhoshree15/20219B/wish/1753218135 since, sodium is the 2nd most reactive substance in the reactivity series, it has a vigorous reaction with water. 
It is an explosive reaction and we can also see some red sparks during the reaction. 
The sodium also forms a silvery ball after reacting with water. ]]> 2021-09-20 07:44:31 UTC https://padlet.com/subhoshree15/20219B/wish/1753218135 https://padlet.com/subhoshree15/20219B/wish/1753218987 1. Highly exothermic and explosive reaction
2. As soon as it is dropped in water , it catches a golden yellow flame
3.When dropped in water, it forms a silvery grey globule that darts aon the surface of water
4.Bubbles of a colourless, odourless, tasteless gas is evolved. The confirmatory for this gas which proves this is hydrogen is that when a burning splinter is introduced, it extinguishes with a popping sound.]]> 2021-09-20 07:44:55 UTC https://padlet.com/subhoshree15/20219B/wish/1753218987 https://padlet.com/subhoshree15/20219B/wish/1753221274 solution turns milky
gas is produced
less vigorous 
sinks in water]]> 2021-09-20 07:46:07 UTC https://padlet.com/subhoshree15/20219B/wish/1753221274 agrnika211 https://padlet.com/subhoshree15/20219B/wish/1753222246 We can see effervescence, when the metal calcium was added to water along with the evolution of a gas. ]]> 2021-09-20 07:46:37 UTC https://padlet.com/subhoshree15/20219B/wish/1753222246 https://padlet.com/subhoshree15/20219B/wish/1753223584 Magnesium burns (steam) to produce white magnesium oxide and hydrogen gas. 
it liberates H2 and white ash-magnesium oxide
burns with a dazzling white flame

]]> 2021-09-20 07:47:19 UTC https://padlet.com/subhoshree15/20219B/wish/1753223584 krrishdeokarwebsites https://padlet.com/subhoshree15/20219B/wish/1753223737 Pink color due to phenolphthalein
Slow reaction
Effervescence
Heating solution to increase speed of reaction]]> 2021-09-20 07:47:24 UTC https://padlet.com/subhoshree15/20219B/wish/1753223737 pathakantranig https://padlet.com/subhoshree15/20219B/wish/1753223976 The setup had no reaction initially, but on heating bubbles were formed and the water turned pinkish- purple

]]> 2021-09-20 07:47:32 UTC https://padlet.com/subhoshree15/20219B/wish/1753223976 https://padlet.com/subhoshree15/20219B/wish/1753224054 Effervescence
On adding Phenolphthalein the solution changes purple indicating its alkaline nature
Slow reaction

]]> 2021-09-20 07:47:35 UTC https://padlet.com/subhoshree15/20219B/wish/1753224054 https://padlet.com/subhoshree15/20219B/wish/1753226038 it was a vigorous reaction.
it was sodium as the it caught on fire and had a golden yellow flame.
it melted and became a silver globule.]]> 2021-09-20 07:48:33 UTC https://padlet.com/subhoshree15/20219B/wish/1753226038 https://padlet.com/subhoshree15/20219B/wish/1753226488 sinks in water
slow reaction at room temperature, faster with increase in temp
steam is produced
turns purple]]> 2021-09-20 07:48:47 UTC https://padlet.com/subhoshree15/20219B/wish/1753226488 krrishdeokarwebsites https://padlet.com/subhoshree15/20219B/wish/1753226954 Lots of effervescence
Hydrogen gas released [How do you know hydrogen is released? How are they testing hydrogen?]
Forms ZnCl2]]> 2021-09-20 07:49:00 UTC https://padlet.com/subhoshree15/20219B/wish/1753226954 https://padlet.com/subhoshree15/20219B/wish/1753228815 Highly vigorous reaction.
Sodium reacts with water with red flames.
At the end it bursts and melted.  ]]> 2021-09-20 07:50:01 UTC https://padlet.com/subhoshree15/20219B/wish/1753228815 https://padlet.com/subhoshree15/20219B/wish/1753229115

Reaction is comparatively less vigorous and less explosive that that of sodium.

Bubbles of odorless and colorless gas are evolved. When the gas is tested with a burning splinter, the flame extinguishes with a popping sound, which proves it is hydrogen gas.

The solution turns milky.

If a moist blue litmus is introduced in a solution, then the color does not change. This proves the solution is alkaline.

Calcium has sunk in water.

]]> 2021-09-20 07:50:11 UTC https://padlet.com/subhoshree15/20219B/wish/1753229115 kavinmanas https://padlet.com/subhoshree15/20219B/wish/1753230092 When zinc reacts with HCl, ZnCl2 is formed along with liberation of hydrogen from the solution. 

It is an exothermic reaction

Effervescence is produced]]> 2021-09-20 07:50:44 UTC https://padlet.com/subhoshree15/20219B/wish/1753230092 yaanviagg132 https://padlet.com/subhoshree15/20219B/wish/1753230507 Effervescence is given out
A gas is liberated
The calcium and water solution turns milky
less vigorous reaction]]> 2021-09-20 07:50:58 UTC https://padlet.com/subhoshree15/20219B/wish/1753230507 agrnika211 https://padlet.com/subhoshree15/20219B/wish/1753230841 The metal magnesium reacts slowly with water at room temperature and there is evolution of a gas. 
When phenolphthalein is added to the solution, it turns magenta pink indicating the presence of an acid. ]]> 2021-09-20 07:51:08 UTC https://padlet.com/subhoshree15/20219B/wish/1753230841 https://padlet.com/subhoshree15/20219B/wish/1753231139 Effervescence occurs
Solution turns milky
gas is being given out
less vigorous.]]> 2021-09-20 07:51:19 UTC https://padlet.com/subhoshree15/20219B/wish/1753231139 https://padlet.com/subhoshree15/20219B/wish/1753234922 Zinc when dropped in HCl releases bubbles of hydrogen gas which is colourless, odourless and tasteless. 
The confirmatory test for this gas is when a burning splinter is introduced , it extinguishes with a popping sound(Hydrogen).
ZnCl2 is produced
exothermic process


]]> 2021-09-20 07:53:03 UTC https://padlet.com/subhoshree15/20219B/wish/1753234922 https://padlet.com/subhoshree15/20219B/wish/1753235716 exothermic
gas is produced
burning splinter extinguishes with a popping sound

]]> 2021-09-20 07:53:29 UTC https://padlet.com/subhoshree15/20219B/wish/1753235716 https://padlet.com/subhoshree15/20219B/wish/1753235993 Magnesium sinks when added to water.
Effervescence occurs
Slow reaction
pinkish-purple colour is seen ]]> 2021-09-20 07:53:39 UTC https://padlet.com/subhoshree15/20219B/wish/1753235993 agrnika211 https://padlet.com/subhoshree15/20219B/wish/1753256474 when the metal zinc was added to water there was effervescence and the evolution of a gas. 
The test tube had also become hot indicating an exothermic reaction.
When the gas was collected and a burning splinter was brought near it, it extinguished with a pop sound hence, the gas produced was hydrogen. ]]> 2021-09-20 08:04:13 UTC https://padlet.com/subhoshree15/20219B/wish/1753256474