Answer:
b) The volume of stock solution used is less than 3 liters.
Explanation:
Given:
Concentration of stock solution of NaCl, M1 = 10 M
Concentration of diluted solution of NaCl, M2 = 1 M
Volume of diluted NaCl solution, V2 = 3 L
Let the volume of stock NaCl solution = V1
Formula:
Use the dilution relation:
Based on the above equation:
Therefore, the volume of stock solution required is 0.3 L which is less than 3 L
Answer:
Back titration is a titration done in reverse; instead of titrating the original sample, a known excess of standard reagent is added to the solution, and the excess is titrated.
I hope it's helpful!
Answer:
The order of elements by volume-fraction (which is approximately molecular mole-fraction) in the atmosphere is nitrogen (78.1%), oxygen (20.9%), argon (0.96%), followed by (in uncertain order) carbon and hydrogen because water vapor and carbon dioxide, which represent most of these two elements in the air, are variable.
I copied and pasted but I hope this information is helpful :)
The best answer choice here would be 'Combination'
