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neonofarm [45]
3 years ago
8

Balance this equation- Fe + O2 Fe3 O4

Chemistry
1 answer:
kherson [118]3 years ago
7 0
3Fe + 2O2 —- Fe3 + O4
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(a) Kw = 1.139 × 10⁻¹⁵ at 0°C and 5.474 × 10⁻¹⁴, find [H₃O⁺] and pH of water at 0°C and 50°C.
kondor19780726 [428]

The  value of [H₃O⁺] and  pH of water at 0°C and 50°C.

0°C value of [H₃O⁺] = 3.375 x 10⁻⁸

50°C value of [H₃O⁺]  = 2.340 x 10⁻⁷

pH of water at 0°C  =  pH = 7.4717

pH of water at 50°C  =  pH  = 6.6308

<h3>pH of water at different level:</h3>

Water with a pH less than 7 is considered acidic, while water with a pH greater than 7 is considered basic. The normal pH range for surface water systems is 6.5 to 8.5, and for groundwater systems is 6 to 8.5. Alkalinity is a measure of a water's ability to withstand a pH change that would cause it to become more acidic.

<h3>According to the given information:</h3>

0°C  =  Kw = 1.139 × 10⁻¹⁵

50°C = 5.474 × 10⁻¹⁴

Solving at  0°C  for  [H₃O⁺] and pH. water is neutral therefore its[H₃O⁺] [OH⁻]

are equal [H₃O⁺] = [OH⁻].

                                                Kw  =  [H₃O⁺] [OH⁻]

                                                  Kw  =  [H₃O⁺]²

                                                  [H₃O⁺] =  √Kw

                                                            =  √1.139 × 10⁻¹⁵

                                                            = 3.375 x 10⁻⁸

                                                pH = -log[H₃O⁺]

                                                      = -log 3.375 x 10⁻⁸

                                                      = 7.4717

Solving at  50°C  for  [H₃O⁺] and pH. water is neutral therefore its[H₃O⁺] [OH⁻]

are equal [H₃O⁺] = [OH⁻].

                                                 Kw  =  [H₃O⁺] [OH⁻]

                                                  Kw  =  [H₃O⁺]²

                                                  [H₃O⁺] =  √Kw

                                                             = √ 5.474 × 10⁻¹⁴

                                                            = 2.340 x 10⁻⁷ M

                                                 pH = -log[H₃O⁺]

                                                       =  -log2.340 x 10⁻⁷

                                                   pH  = 6.6308

The  value of [H₃O⁺] and  pH of water at 0°C and 50°C.

0°C value of [H₃O⁺] = 3.375 x 10⁻⁸

50°C value of [H₃O⁺]  = 2.340 x 10⁻⁷

pH of water at 0°C  =  pH = 7.4717

pH of water at 50°C  =  pH  = 6.6308

To know more about pH of water visit:

brainly.com/question/13822050

#SPJ4

I understand that the question you are looking for is:

Kw = 1.139 × 10⁻¹⁵ at 0°C and 5.474 × 10⁻¹⁴, find [H₃O⁺] and pH of water at 0°C and 50°C. find the  [H₃O⁺] and  pH of water at 0°C and 50°C.

 

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An acidic substance is any substance with a pH of less than 7, the smaller the number the more acidic it is. ... An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted.

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