Kamir and Alexis are studying the properties of water. They conducted a variety of experiments to determine its physical and che
2 answers:
Answer: D) Neutral water react s with carbon dioxide to form an acid solution.
Explanation: A physical property is defined as the property in which a change in shape, size takes place. No new substance gets formed while measuring physical properties.
Example: A) Salt dissolves in water.
B) Oil and water do not mix.
C) Pencil shavings float on water and do not dissolve.
A chemical property is defined as the property in which a change in chemical composition takes place. A new substance is formed while measuring chemical properties.
Example: D) Neutral water react s with carbon dioxide to form an acid solution.
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Answer:
2KI + Cl₂ → 2KCl + I₂
Explanation:
The reaction equation is given as:
KI + Cl₂ → KCl + I₂
The problem at hand is to balance this chemical reaction. To solve this problem we use a mathematical approach;
aKI + bCl₂ → cKCl + dI₂
Conserving K : a = c
I : a = 2d
Cl : 2b = c
Now let a = 1, c = 1 , d = , b =
, ;
Multiply through by 2;
a = 2, b = 1 , c = 2, d = 1
2KI + Cl₂ → 2KCl + I₂