Water is reactive under certain conditions. Keeping water out of your reactions and work ups helps prevent nasty side reactions.

A Two-Stage Reaction
When you add a hydrochloric acid (HCl) solution to a solution of sodium carbonate (Na2CO3), the hydrogen ion in HCl switches places with one of the sodium ions in Na2CO3 to produce sodium hydrogencarbonate, also known as sodium bicarbonate (baking soda), and sodium chloride (salt).

Na2CO3(aq) + HCl(aq) → NaHCO3(aq) + NaCl(aq)

Sodium hydrogencarbonate is basic, and it reacts with the HCl still in solution to produce sodium chloride, carbon dioxide and water.

NaHCO3(aq) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l)

Phenolphthalein is a good indicator for the first reaction because it responds to the pH change caused by the formation of sodium hydrogencarbonate. It is pink in basic solutions and turns colorless as soon as the solution becomes acidic. Methyl orange, on the other hand, responds to pH changes associated with the formation of NaCl, changing from yellow to red as the solution becomes more acidic. At neutrality, it is a distinct orange color

Eosin-Y indicator is Untied State pharmacopea mentioned indicator.
But in titration , final colour of indicator disappears on standing the solution for 2 minutes.. also it does not give sharp colour change . Thats why no satisfacory results are obtained..
Can any one help how to get accurate results using Eosin-Y indicator ??

If one removes acetone via rotary evaporation, what will happen to the crystal bond?

On the Separations of the Elements from Metals.
"Take salt nitre, vitriol, and alum, in equal parts, which you will distil into aqua tortis. Pour this water again on its faeces, and distil it again in glass. In this aqua fortis clarify silver, and afterwards dissolve in it sal ammoniac.
Having done this, take a metal reduced into thin plates in the same way,
that is, in the same water. Afterwards separate it by the balneum Manse,
pour it on again, and repeat this until there be found at the bottom an oil, namely, from the Sun, or gold, of a light red colour ; of the Moon, a light blue ; of Mars, red and very dark ; of Mercury, white ; of Saturn, livid and leaden ; of Venus, bright green ; and of Jupiter, yellow. All metals are not thus reduced to an oil, except those which have been previously prepared. For instance. Mercury must be sublimated ; Saturn calcined ; Venus florified ; Iron must be reduced to a crocus ; Jupiter must be reverberated ; but the Sun and Moon easily yield themselves. All metals are not thus reduced to an oil, except those which have been previously prepared. For instance. Mercury must be sublimated ; Saturn calcined ; Venus florified ; Iron must be reduced to a crocus ; Jupiter must be reverberated ; but the Sun and Moon easily yield themselves. earth and fire. For from the cold and the moisture is produced the substance and corporality of the Moon, which is, indeed, of a fixed nature, and cannot be elevated. From Mercury there remains fire at the bottom, and earth and water are elevated upwards. From Venus there also remains fire, and both, that is to say, earth and water, remain in the bath. From Saturn there remains the element of earth at the bottom, while fire and water are held in the bath. From Jupiter air remains at the bottom, while fire, water, and earth are elevated therefrom. (...)"

THE THIRD BOOK OF THE ARCHIDOXIES,
From the Theophrastia of Paracelsus the Great.

What this guy is saying make any sense chemically?