Write a chemical equation that illustrates the autoionization of water.

The autoionization of water is:

2H₂O ⇄  H₃O⁺  +  OH⁻        Kw

Explanation

2 moles of water can generate hydronium and hydroxide, when they work as an acid or as a base

If we take account that the concentration of protons (hydroniums), at the standard temperature is 1×10⁻⁷ M, it can be considered that the molarity of water is a constant that can be incorporated into a “greater” constant that also includes to Kc and that is known as ionic product of water, Kw. The expression is:

Kw = [H₃O⁺] . [OH⁻] / [H₂O]²

We do not include water → Kw =  [H₃O⁺] . [OH⁻]

Since the water dissociation reaction produces the same concentration of H₃O⁺ as OH⁻, [OH⁻] in pure water will also be 1×10⁻⁷ M

Kw = 1×10⁻⁷ . 1×10⁻⁷ = 1×10⁻¹⁴

pKw = pH + pOH

14 = 7 + 7

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.