Which season will the northern hemisphere experience when the axis of Earth is tilted towards the sun? Fall Spring Summer Winter

Chemistry

2 answers:

miskamm [114]3 years ago

5 0

Answer:

The correct answer is summer.

Explanation:

In the Northern Hemisphere, the summer season starts on June 20 or 21 termed as the summer solstice. It occurs as the axis of rotation gets tilted towards the Sun by full 23.5 degrees and attaining the most direct sunlight of the annum during the longest day. On the other hand, the Southern Hemisphere has its winter solstice, that is, the shortest day of the annum, as the axis of rotation gets tilted away from the Sun.

aleksley [76]3 years ago

3 0

The season will be summer

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For the generic equilibrium HA(aq) ⇌ H+(aq) + A−(aq), which of these statements is true? For the generic equilibrium , which of

timama [110]

<u>Answer:</u> The correct statement is if you add the soluble salt KA to a solution of HA that is at equilibrium, the pH would increase.

<u>Explanation:</u>

Common ion effect is defined as the effect which occurs on equilibrium when a common ion (an ion which is already present in the solution) is added to a solution. This effect generally decreases the solubility of a solute.

Equilibrium reaction of HA and KA follows the equation:

$HA\rightleftharpoons H^{+}(aq.)+A^{-}(aq.)$

$KA\rightleftharpoons K^+(aq.)+A^{-}(aq.)$

According to Le-Chateliers principle, if there is any change in the variables of the reaction, the equilibrium will shift in the direction in order to minimize the effect.

In the equilibrium reactions, $A^-$ ion is getting increased on the product side, so the equilibrium will shift in the direction to minimize this effect, which is in the direction of HA.

Thus, the addition of KA will shift the equilibrium in the left direction.

Equilibrium constant depends on the temperature of the system. It does not have any effect on any change of pH.

pH is defined as the negative logarithm of hydrogen ions present in the solution

If the solution has high hydrogen ion concentration, then the pH will be low.
If the solution has low hydrogen ion concentration, then the pH will be high.

As, the equilibrium is shifting in the left direction, that means concentration of $H^+$ ions are getting decreases. This will increase the pH of the solution.