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Genrish500 [490]
4 years ago
7

In order for a reaction to occur, reactant molecules must collide with each other. true or false

Chemistry
1 answer:
viva [34]4 years ago
5 0
In order for a reaction to occur, reactant molecules must collide with each other is True.
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D Which compound is insoluble in water?
densk [106]

Answer:

Examples of substances insoluble in water: oil, acetone, ether

Explanation:

Such examples of substances are non-polar and do not dissolve in water (polar compound). The classic example is oil floating in water (this happens because oil has a lower density than water).

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[20 Points!] The solubility product constant of calcium hydroxide is 6.5 x 10^-6. If 0.10 mol of sodium hydroxide is added to 1
sleet_krkn [62]
For Ca(OH)2, Ksp = [Ca2+][OH-]^2
You have your Ksp as 6.5 x 10^-6. Your [OH-] comes almost entirely from the 0.10 mol of NaOH, since Ca(OH)2 barely dissolves. Your [OH-] is therefore 0.10 M (since you have 1 L of solution).

6.5 x 10^-6 = [Ca2+](0.10)^2
Solve for [Ca2+]:
6.5 x 10^-6 / (0.10)^2 = [Ca2+]
[Ca2+] = 0.00065 M

The maximum concentration of [Ca2+] is 0.00065 M, and you have 0.0010 M Ca(OH)2, so you’ll end up with 0.00065 M Ca2+ in solution.
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Compared to the charges of a proton the charge of an electron has
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