Answer:
1. The methods used for the separation were filtration and evaporation
Explanation:
The mixture of table salt and sand is first dissolved in distilled water. The salt is soluble in water but the sand is not. The solution is now filtered. The filtrate contains the salt solution while the residue is the sand. The filtrate is now evaporated to dryness to recover the table salt from solution.
From the experiment we can clearly see that table salt is highly soluble in water.
One precaution during the experiment is to ensure that the filter paper was placed correctly before filtration started.
Distance and period of time is the correct answer
Hope this helps!
Answer:
98
Explanation:
Based on the reaction:
NaOH + H2SO4 → NaHSO4 + H2O
<em>Where 1 mole of the base (NaOH) reacts per mole of the acid (H2SO4)</em>
<em />
The formula of equivalent weight is:
Equivalent weight = Molecular mass / Number of equivalent moles
<em>Where Molecular mass of sulfuric acid is 98g/mol</em>
<em>And number of equivalent moles = 1 -Because 1 mole of acid reacts per mole of base</em>
<em />
Equivalent weight is:
98 / 1 =
98
Answer:8.35%
Explanation:
Total volume of solution = 46.9ml of acetone + 515ml of water
= 561.9ml
Therefore, the precentage of acetone in the solution = 46.9ml/561.9ml * 100
= 8.35%