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adelina 88 [10]

2 years ago

7

Solution with a ph of 3 has how many times more h+ ions than one with a ph of 4? 5?

1 answer:

Lerok [7]2 years ago

8 0

Solution with a pH of 3 has 10⁻³ moles of H⁺, solution with a pH of 4 has 10⁻⁴ moles of H⁺ and solution with a pH of 5 has 10⁻⁵ moles of H⁺ (in dm³) so the solution with a pH of 3 has 10 times more H⁺ ions than the solution with a pH of 4 and 100 times more H⁺ ions than the solution with a pH of 5.

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2 years ago

Write the formula and determine the percent by mass of the salt in barium hydroxide octahydrate *

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2 years ago

Determine the number of grams in each of the quantities<br><br> 1.39.0 x 1024 molecules Cl2

STatiana [176]

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<h3>Further explanation</h3>

A mole is a number of particles(atoms, molecules, ions) in a substance

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Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol Cl₂ :

$\tt n=\dfrac{N}{No}\\\\n=\dfrac{1.39.10^{24}}{6.02.10^{23}}\\\\n=2.31$

mass Cl₂(MW=71 g/mol) :

$\tt mass=mol\times MW\\\\mass=2.31\times 71=164.01$

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2 years ago