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Lemur [1.5K]
3 years ago
14

Lab Safety Rule #3 says to always add acids or bases to the solvent and NEVER the other way around true or false?

Chemistry
1 answer:
VladimirAG [237]3 years ago
7 0

Answer:

true

Explanation:

<em>The standard laboratory rule is to always add acids or bases to solvent and not the other way round.</em>

The dissolution of concentrated acids/bases in solvents (water) generates heat energy. Thus, if the solvent is added to them, a layer of hot weak acid or base will be formed and this will boil and spray around, causing an explosion.

On the other hand, if acid/base is added to solvents, they flow into the solvents and get diluted immediately without any boiling taking place. Hence, it is safe to add acid/base to solvents and not the other way round.

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3 years ago
Calculate the standard enthalpy change for the reaction at 25 ∘ C. Standard enthalpy of formation values can be found in this li
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Answer:

-179.06 kJ

Explanation:

Let's consider the following balanced reaction.

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ΔH°r = 1 mol × ΔH°f(NaCl(s)) + 1 mol × ΔH°f(H₂O(l)) - 1 mol × ΔH°f(HCl(g)) - 1 mol × ΔH°f(NaOH(s))

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ΔH°r = -179.06 kJ

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Answer:

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