Explanation:
The solution of the lactic acd and sodium lactate is referred to as a buffer solution.
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. In this case, the weak acid is the lactic acid and the conjugate base is the sodium lactate.
Buffer solutions are generally known to resist change in pH values.
When a strong base (in this case, NaOH) is added to the buffer, the lactic acid will give up its H+ in order to transform the base (OH-) into water (H2O) and the conjugate base, so we have:
HA + OH- → A- + H2O.
Since the added OH- is consumed by this reaction, the pH will change only slightly.
The NaOH reacts with the weak acid present in the buffer sollution.
Answer:
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Explanation:
It shows that gold (all) atoms are made of mostly empty space. The alpha particles go right through because they hit nothing in the atoms which showed Rutherford that atoms are mostly empty space.
Answer: It is chemical energy, which is a type of potential energy.
Explanation: Natural gas consists of mixture of hydrocarbons such as methane, butane and others which are chemical substances, thus they contain chemical energy stored in the bonds of the molecules.
Potential energy is any form of energy that has stored potential that can be used later. Examples include nuclear energy, chemical energy, etc.
Thus the type of energy present in natural gas is chemical energy, which is a type of potential energy.
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