Answer:
Lemon juice has lowest pH.
Explanation:
pH is the negative log of hydrogen ion concentration. By increasing the Hydrogen ion concentration pH will decrease.
pH = -log [H⁺]
According to pH scale,
The pH of 7 is consider neutral. The pH below the 7 is consider acidic and above the 7 is basic.
The sodium hydroxide is strongest base because it fully dissociate into ions.
It dissociate to gives the sodium and hydroxyl ions and solution became more basic.
NaOH → Na⁺(aq) + OH⁻(aq)
Its pH is 12. It is also known as caustic soda.
The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.
The pH of lemon juice is ranging between 2-3.
The pH of tap water is ranging between 6-8.5.
From above given information it can be noticed that lemon juice have lowest pH i.e 2-3. It is acidic, because its pH is less than 7.
Answer:
4 C2H5 + 13 O2 -> 8 CO2 + 10 H2O
Explanation:
What I do is I make a chart of how many elements the product side and reactant sides have:
Reactants-
2 C
5 H
2 O
Products-
1 C
3 O
2 H
It's easier to see how many coefficients are needed for the reaction to be balanced then. Hope this helped.
K is the chemical symbol for potassium
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. ... Examples of large crystals include snowflakes, diamonds, and table salt.