In an experiment, acid was added to two solutions:

Solution 1: distilled water only

Solution 2: distilled water containing sodium bicarbonate

Then, the pH of each solution was taken.

Solution 1 had a final pH of 4.5, while Solution 2 had a final pH of 6.8.

Which of the following statements explains the difference between the two solutions?

Choose 1

(Choice A)

Sodium bicarbonate acted as a pH buffer in Solution 2.

(Choice B)

Hormones released in Solution 2 allowed it to maintain a higher pH.

(Choice C)

The water in Solution 1 had a lower starting pH than the water in Solution 2.

(Choice D)

Sodium bicarbonate increases the temperature of a solution, which helped raise the pH of Solution 2.

Sodium bicarbonate acted as a pH buffer in Solution 2.

Explanation:

One the other hand, sodium bicarbonate is alkaline in nature and has pH of 8.4. When an acid is added to a solution containing sodium bicarbonate, it will act as a pH buffer for acid and neutralize the acidic effect.

Other options are incorrect because there are no hormones added neither they will be produced or released during the reaction.

Also, lower initial pH of the solution 1 will not help to increase the pH after addition of acid.

Neither change in temeprature can change the pH.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.