The molar concentration of the original HF solution : 0.342 M
Further explanation
Given
31.2 ml of 0.200 M NaOH
18.2 ml of HF
Required
The molar concentration of HF
Solution
Titration formula
M₁V₁n₁=M₂V₂n₂
n=acid/base valence (amount of H⁺/OH⁻, for NaOH and HF n =1)
Titrant = NaOH(1)
Titrate = HF(2)
Input the value :
Answer:
d. when atoms are situated in a repeating array over large atomic distances.
Explanation:
A crystalline material -
It refers to the type of solid substance where the atoms or ions are arranged in a very orderly fashion , composing a well designed lattice , is referred to as crystalline material .
These type of substances are studied under a special subtopic known as crystallography .
Hence , from the given information of the question ,
The correct option is d.
Rainforest with lots of moisture and humidity is you answer
