Answer:
Acid-base indicators are chemicals used to determine whether an aqueous solution is acidic, neutral, or alkaline. Because acidity and alkalinity relate to pH, they may also be known as pH indicators. Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice.
Explanation:
It has a high percentage of germination in pH’s 13-14 this shows that radish seeds can germinate very well in almost all pH levels
Option one ( which is Aluminium Carbonate ) is the answer
<span>The amount of
protons is equal to the number of electrons of a chemical element. The atomic
number of an element also determines the number of the protons it contains.
The number of protons is also the same number of electrons. Protons are positively charged, electrons are
negatively charged. To get the number of neutrons, all you need is to deduct
the number of the atomic mass or mass number from the atomic number. Potassium has 19
protons, therefore has 19 electrons as well. The atomic mass of Potassium is
39. So, the number of neutrons Potassium has is 20. </span>
Potassium
Atomic
number: 19
Protons: 19
Electrons: 19
Atomic Mass:
39
Neutron: 20
Nitrogen
Atomic
number: 7
Protons: 7
Electrons: 7
Atomic Mass:
14.007
Neutrons: 7
Oxygen
Atomic
Number: 8
Protons: 8
Electrons: 8
Atomic Mass:
15.99
Neutrons: 8
Answer:
[H₂O] > [H₃O⁺] ≳ [Cl⁻] > [OH⁻] > [HCl]
Explanation:
HCl + H₂O ⟶ H₃O⁺ + Cl⁻
HCl dissociates completely in solution.
[HCl] = 0 mol·L⁻¹
[H₃O⁺] = 1.0 × 10⁻⁶ mol·L⁻¹
[Cl⁻] = 1.0 × 10⁻⁶ mol·L⁻¹
[H₃O⁺] is slightly greater than [Cl⁻] because the autoionization of water also creates some hydronium ion.
1 L of water has a mass of 1000 g.
∴ [H₂O] = 55.49 mol·L⁻¹
![[\text{OH}^{-}] = \frac{K_{w} }{\text{[H}_{3}\text{O}^{+}]} = \frac{1.00 \times10^{-14} }{ 1.0 \times 10^{-6}}= 1.0 \times 10^{-8} \text{ mol/L}](https://tex.z-dn.net/?f=%5B%5Ctext%7BOH%7D%5E%7B-%7D%5D%20%3D%20%5Cfrac%7BK_%7Bw%7D%20%7D%7B%5Ctext%7B%5BH%7D_%7B3%7D%5Ctext%7BO%7D%5E%7B%2B%7D%5D%7D%20%3D%20%5Cfrac%7B1.00%20%5Ctimes10%5E%7B-14%7D%20%7D%7B%201.0%20%5Ctimes%2010%5E%7B-6%7D%7D%3D%201.0%20%5Ctimes%2010%5E%7B-8%7D%20%5Ctext%7B%20mol%2FL%7D)
∴ [H₂O] > [H₃O⁺] ≳ [Cl⁻] > [OH⁻] > [HCl]
55.5 10⁻⁶ 10⁻⁶ 10⁻⁸ 0
