Answer:-
1) The pH of sodium bicarbonate will be around 8 as it is slightly basic. So the color will be blue.
2) The correct method for finding the pH of a solution is to use a dropper and drop wise add the solution to the pH paper lying on a glass tile. Hence the answer is 3.
3) HCl is an acid. The pH of HCl should be 1-2. NaOH is a base. It’s pH should be around 13-14.
KCl is a salt of a strong acid and strong base. It should have pH near 7. Distilled water has pH of 7. So the solutions with equal pH are KCl and distilled water. So the answer is number 4 (B and D).
A substance with a pH level of 8 has a lower level of Hydroxide (OH), not quite as basic as a pH of 12 but still basic and close to being almost neutral.
A substance with a pH of 12 has a high concentration of Hydroxide (OH) atoms, therefore, is much more basic than a pH of 8.
Answer:
Explanation:
Protozoa and Bacteria: Protozoa are very small one-celled creatures. They play an important role in helping to make the soil better by feeding on bacteria and releasing excess nitrogen, which is really good for plants. Bacteria are among the tiniest and most numerous organisms in the soil.
Answer:
2/3
Explanation:
Crystals structures can also be seen when two elements combines together and the perfect example is Al₂O₃ which is given in the question above. Just like it is given in the question above, the kind of arrangement in the crystal structure for Al₂O₃ is called HCP which stands for Hexagonally Closed Pack.
The aluminum ions which is in form of Al³⁺ occupies the two-third[2/3] positions while the position that the oxygen ion occupies is one[1].
It has 1 valence electron.