The concentration of hydronium ions is greater than 1 x 10^−7 for acidic solutions. True False
1 answer:
Answer:
True.
Explanation:
Remember that hydronium ions indicate the concentration of an acid.
On the pH scale, the acids are between 0 and 7, and for bases, the pH is between 7 and 14.
The formula to calculate the pH of an acid is the following:
Now, let's replace the value of the given concentration in the formula, which is 1 x 10⁻⁷:
You can note that if the value of hydronium concentration is greater than 1 x 10⁻⁷, and we replace it in the formula, we will obtain lower pHs, which means that it is an acidic solution.
The answer would be true.
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Solving part-1 only
#1
KMnO_4
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#2
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- Purple as per the color of potassium permanganate
#4
Answer:
126.73 mL
Explanation:
The total pressure of the gas mixture is the sum of the vapor pressure of its constituents. So, the vapor pressure of N₂O(p) can be calculated:
750 = 18.85 + p
p = 750 - 18.85
p = 731.15 torr
It means that for 731.15 torr, N₂O occupied 130 mL. For the general gas equation, we know that
Where <em>p</em> is the pressure, <em>V</em> is the volume, <em>T</em> is the temperature, 1 is the initial state, and 2 the final state. For the same temperatue (21ºC), the equation results on Boyle's law:
p1V1 = p2V2, so:
731.15x130 = 750xV2
750V2 = 95049.5
V2 = 126.73 mL