Hello!
<span>a. gains a proton and loses a neutron. </span>This process gives more stability to the atom.
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Answer : Hg (Mercury)
Explanation : In the given series of elements Na falls after the Cu in the reactivity series, for Pb it also falls after Cu, and for Mg it is the same.
Only Hg which is mercury can spontaneously donate its electrons to copper in the solution because it falls before Cu in the reactivity/activity series.
<span>Solvent is ethyl alcohol.
hope this helps!</span>
Answer:
1) Add more sulfate ions.
2) 1 M K₂SO₄.
Explanation:
<em>1) Which of the following actions would shift this reaction toward solid barium sulfate?</em>
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- Le Châtelier's principle states that if a stress is applied to a system at equilibrium, the system will shift to relieve that stress and attain the equilibrium again.
Add more sulfate ions will increase the concentration of the products side, so the reaction will be shifted towards the reactants side to relieve the stress and attain the equilibrium again.
<em>So, the right choice is: Add more sulfate ions.</em>
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<em>2) In which of the following would barium sulfate be least soluble? </em>
The answer is 1 M K₂SO₄, it has a common ion effect of SO₄⁻ ions that increase the concentration of the products side, so the reaction will be shifted towards the reactants side to relieve the stress and attain the equilibrium again.
<em>So, the solubility will decrease.</em>
