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2 years ago

Assuming equal concentrations, arrange these solutions by pH.

Chemistry

1 answer:

LenKa [72]2 years ago

8 0

Answer:

Highest pH(most basic)

Sr(OH)2(aq)

KOH (aq)

NH3(aq)

HF (aq)

HClO4(aq)

Lowest pH(most acidic)

Explanation:

The concentration of H+ ion will determine the pH of a solution. The pH actually reflects the ratio of H+ ion and OH- since both of them can combine into water. Solution with more H+ ion will have a lower pH and called acidic, while more OH- will have high pH and be called basic. Strong acid/base will be ionized more than weak acid/base.

Sr(OH)2(aq) = strong base, release 2 OH- ion per mole

KOH (aq) = Strong base, release 1 OH- per mole

NH3(aq) = weak base, release less than 1 OH- per mole

HF (aq) =strong acid, release 1 H+ per mole

HClO4(aq) = stronger acid, release 1 H+ per mole

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3 years ago

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2 years ago

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hope this helps!

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2 years ago

Please help<br><br><br> How many moles are there in 7.57 x 10^30 molecules of CO2?

Oxana [17]

Answer:

The answer is

<h2>12,574,750.83 moles</h2>

Explanation:

In order to find the moles of CO2 we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 7.57 × 10^30 molecules of CO2

We have

$n = \frac{7.57 \times {10}^{30} }{6.02 \times {10}^{23} } \\ = 12574750.83056...$

We have the final answer as

<h3>12,574,750.83 moles</h3>

Hope this helps you

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2 years ago