Metals + cold water.
Li, Na, K, Ca.
Notes on reactions, equations or space? <<<< don't no what space or equations means. can someone help?
Also, say order of reactivity.
see equation 13.10 for these very active metal reactions.
http://books.google.com/books?id=rGM39e3HqvYC&pg=PA347&lpg=PA347&dq=active+metals++and+water+reactions&source=bl&ots=Q9PjQxytN0&sig=ApQu4us2xNoCfwa87sS1ludGmCE&hl=en&ei=TsO7SfviN4K2NPujlZYI&sa=X&oi=book_result&resnum=8&ct=result
I have no idea what space means here. Equations mean what is the reaction?
Your cryptic question must be clarified if we are to help. Please amplify.
With Li, Na and K the reactions are exothermic [give out heat] and you would see flames and the metals would move vigorously on top of the water.
The reactivity order is Li<Na<K
so K is the most reactive.
The reaction of an alkali metal with water gives a Hydroxide and Hydrogen given off.
Here is the balanced equation for K
2K + 2H2O -> 2KOH + H2
2Na + 2H2O -> 2NaOH + H2
You can do the one for Li now.
For Ca the equation is slightly different as Ca has a valency of 2 so 2 OH- ions can attach which gives
Ca+ 2H2O -> Ca(OH)2 + H2
This reaction is less vigorous than the above metals [unless the water is hot in which case it's very vigorous]
I don't know what 'space' means for this question but I hope the rest has helped.
When metals react with water, they can form metal hydroxides and hydrogen gas. Let's break down the reaction for each metal:
1. Lithium (Li):
- Reactivity: Lithium is the most reactive metal in this group.
- Reaction: 2Li(s) + 2H₂O(l) → 2LiOH(aq) + H₂(g)
- Explanation: Two lithium atoms react with two water molecules to produce two lithium hydroxide molecules and one molecule of hydrogen gas.
2. Sodium (Na):
- Reactivity: Sodium is less reactive than lithium but more reactive than potassium and calcium.
- Reaction: 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)
- Explanation: Two sodium atoms react with two water molecules to form two sodium hydroxide molecules and one molecule of hydrogen gas.
3. Potassium (K):
- Reactivity: Potassium is less reactive than both lithium and sodium but more reactive than calcium.
- Reaction: 2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g)
- Explanation: Two potassium atoms react with two water molecules to produce two potassium hydroxide molecules and one molecule of hydrogen gas.
4. Calcium (Ca):
- Reactivity: Calcium is the least reactive metal in this group.
- Reaction: Ca(s) + 2H₂O(l) → Ca(OH)₂(aq) + H₂(g)
- Explanation: One calcium atom reacts with two water molecules to yield one calcium hydroxide molecule and one molecule of hydrogen gas.
Order of Reactivity (most to least reactive): Li > Na > K > Ca
Note on equations: The equations provided above represent the chemical reactions that occur when each metal reacts with water. They show the reactants on the left side and the products on the right side. The symbols (s), (l), and (aq) indicate the physical state of the substances: (s) represents a solid, (l) represents a liquid, and (aq) represents an aqueous solution (a solution in water).
Note on space: In the context of your question, "space" refers to the term used for an empty line or a separate line used to separate information or indicate a new point.