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wlad13 [49]
2 years ago
14

A student adds hydrobromic acid (HBr) to a solution of sodium bromide at equilibrium. How does this change affect the system?

Chemistry
1 answer:
egoroff_w [7]2 years ago
4 0

The addition of bromine would cause the equilibrium to shift towards the reactant's side.

<h3>Equilibrium</h3>

When a reaction is in equilibrium and one of the constraints that affect the rate of reactions is applied, the equilibrium shifts so as to annul the effects of the introduced constraints.

Thus, for the reaction

NaBr(s) ⇌ Na+(aq) + Br−(aq)

The addition of HBr would introduce more Br- into the reaction. Consequently, the equilibrium will shift to produce more NaBr so as to annul the effects of the addition of Br-

More on equilibrium can be found here:  brainly.com/question/4289021

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Because of its high reactivity which element is normally obtained by the electrolysis
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<span>Lithium has a property of high reactivity and to obtain lithium is through electrolysis of its fused salts. Because lithium is very reactive, it is not found free so electrolysis is use to split it apart to get it.  Moreover, Lithium is an alkali metal with single valence electron that is easily given up to form cation, which make it a good conductor of heat and electricity.</span>

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8 0
2 years ago
How many grams of NaCI per kilogram of water are present in a 2.7 molal aqueous solution​
navik [9.2K]

Answer:

157.79 g

Explanation:

The definition of molality is:

  • molality = moles of solute / kilogram of solvent

This means that in a 2.7 molal solution, there are 2.7 moles of NaCl per kilogram of water.

So now w<u>e convert those 2.7 moles of NaCl to grams</u>, using its <em>molar mass</em>:

  • 2.7 mol * 58.44 g/mol = 157.79 g
5 0
2 years ago
Which answer best describes the potential energy diagram for a reaction that takes place in water, if the temperature of the sur
blondinia [14]
D. the potential energy of the reactants is low; the potential energy decreases gradually; then increases slightly.

6 0
3 years ago
Read 2 more answers
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8 0
3 years ago
2KClO3(s) =&gt; 2KCl(s) + 3O2(g) <br> is there an increase or decrease of entropy?
ValentinkaMS [17]

Answer:

Entropy increases

Explanation:

Entropy (S) is a measure of the degree of disorder.  For a given substance - say water - across phases the following is true ...

S(ice) < S(water) << S(steam)

For a chemical process, entropy changes can be related to increasing or decreasing molar volumes of gas from reactant side of equation to product side of equation. That is ...

if molar volumes of gas increase, then entropy increases, and

if molar volumes of gas decrease, then entropy decreases.

For the reaction                  2KClO₃(s) => 2KCl(s) + 3O₂(g)

molar volumes of gas =>       0Vm*            0Vm      3Vm

*molar volumes (Vm) apply only to gas phase substances. Solids and liquids do not have molar volume.

Since the reaction produces 3 molar volumes of O₂(g) product vs 0 molar volumes of reactant, then the reaction is showing an increase in molar volumes of gas phase substances and its entropy is therefore increasing.

3 0
3 years ago
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