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3 years ago

8

During a volcanic eruption, large amounts of poisonous gases and particles are released into the atmosphere. How do some of thes

e gases eventually reach the Earth's surface?
A) through rain
B) through wind
C) through lava
D) through trees

1 answer:

xz_007 [3.2K]3 years ago

3 0

A through rain because it is:)

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7.05 = 7.21 + log [HPO42-]/[H2PO4-]

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10^-0.16 = [HPO42-]/[H2PO4-]

0.6918 = [HPO42-]/[H2PO4-]

Let's say the volume of HPO42-= x then the volume of H2PO4- will be 250 mL - x

Since both have a concentration of 1M = 1 mol /L

If we plug this in the equation 0.6918 = [HPO42-]/[H2PO4-]

0.6918 = x / (250 - x)

0.6918*250 - 0.6918x = x

172.95 = 1.6918x

x = 102.228 mL

The volume of HPO42- = 102.228 mL

Then the volume of H2PO4- = 250 - 102.228 = 147.772 mL

To control this we can plug this in the pH equation

7.05 = 7.21 + log [HPO42-]/[H2PO4-]

7.05= 7.21 + log (102.228 / 147.772) = 7.05

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