Chemistry, 24.06.2019 07:50 Tcareyoliver

"each value below represents a different aqueous solution at 25 °c. classify each solution as acidic, basic, or? are the following acidic, basic or nuetral? poh=3.37 poh=11.40 [h+]=3.8x10^-4 [h+]=5.8x10^-8 [oh-]=3.5x10^-12 [oh-]=6.6x10^-3 [h+]=1.0x10^-7 poh=7 ph=5.11 ph=12.94"

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Answer from: Lydiaxqueen

1) pOH = 3.37 The solution is basic.

2) pOH = 11.40 The solution is acidic.

3) [H⁺] = 3.8 x 10⁻⁴ The solution is acidic.

4) [H⁺] = 5.8 x 10⁻⁸ The solution is basic.

5) [OH⁻] = 3.5 x 10⁻¹² The solution is acidic.

6) [OH⁻] = 6.6 x 10⁻³ The solution is basic.

7) [H⁺] = 1.0 x 10⁻⁷ The solution is neutral.

8) pOH = 7 The solution is neutral.

9) pH = 5.11 The solution is acidic.

10) pH=12.94 The solution is basic.

Explanation:

We can determine the nature of the solution, acidic, basic or neutral, from the value of the pH.

pH is a sclale from 0 to 14.

If pH < 7, the solution is acidic.If pH = 7, the solution is neutral.If pH > 7, the solution basic.

1) pOH = 3.37:

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 3.37 = 10.63.

∵ pH > 7.

∴ The solution is basic.

2) pOH = 11.40:

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 11.40 = 2.60.

∵ pH < 7.

∴ The solution is acidic.

3) [H⁺] = 3.8 x 10⁻⁴:

∵ pH = - log[H⁺].

[H⁺] = 3.8 x 10⁻⁴ M.

∴ pH = - log(3.8 x 10⁻⁴ M) = 3.42.

∵ pH < 7.

∴ The solution is acidic.

4) [H⁺] = 5.8 x 10⁻⁸:

∵ pH = - log[H⁺].

[H⁺] = 5.8 x 10⁻⁸ M.

∴ pH = - log(5.8 x 10⁻⁸ M) = 7.236.

∵ pH > 7.

∴ The solution is basic.

5) [OH⁻] = 3.5 x 10⁻¹²:

∵ pOH = - log[OH⁻].

[OH⁻] = 3.5 x 10⁻¹² M.

∴ pOH = - log(3.5 x 10⁻¹² M) = 11.46.

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 11.46 = 2.54.

∵ pH < 7.

∴ The solution is acidic.

6) [OH⁻] = 6.6 x 10⁻³:

∵ pOH = - log[OH⁻].

[OH⁻] = 6.6 x 10⁻³ M.

∴ pOH = - log(6.6 x 10⁻³ M) = 2.18.

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 2.18 = 11.82.

∵ pH > 7.

∴ The solution is basic.

7) [H⁺] = 1.0 x 10⁻⁷:

∵ pH = - log[H⁺].

[H⁺] = 1.0 x 10⁻⁷ M.

∴ pH = - log(1.0 x 10⁻⁷ M) = 7.0.

∵ pH = 7.

∴ The solution is neutral.

8) pOH = 7:

∵ pH + pOH = 14.

∴ pH = 14 - pOH = 14 - 7.0 = 7.0.

∵ pH = 7.

∴ The solution is neutral.

9) pH = 5.11:

∵ pH < 7.

∴ The solution is acidic.

10) pH = 12.94:

∵ pH > 7.

∴ The solution is basic.

Answer from: Quest

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet

Answer from: Quest

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?

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