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3 years ago

PLEASE HELP ASAP

Chemistry

2 answers:

sashaice [31]3 years ago

3 0

Answer:

put a salt into the beakers

Airida [17]3 years ago

3 0

Mark Brainliest please

For ethanol you test a cereic ammonia nitrate test ethanol gives you blue voilet color so you can easily guess what is ethanol
for HCL you use a NACL which makes a compund neutral so you easily guess it
and rest of it LI2SO4 you can label it

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Most sulfide compounds of the transition metals are insoluble in water. Many of these metal sulfides have striking and character

docker41 [41]

Answer:

$Fe^{2+}(aq)+H_2S(aq)\rightarrow FeS (s)+2H^+ (aq)$

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Explanation:

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Hydrogen sulfide is a weak acid, so it only ionizes to ions to a very low extent. This means we would expect to see it in a molecular form in a net ionic equation rather than a dissociated form (hydrogen cations and sulfide anions). In each of these net ionic equations, we expect the three cations to displace hydrogen from hydrogen sulfide and form three precipitates.

Firstly, iron(II) displaces hydrogen forming iron(II) sulfide and acidic conditions:

$Fe^{2+}(aq)+H_2S(aq)\rightarrow FeS (s)+2H^+ (aq)$

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$2Cr^{3+}(aq)+3H_2S(aq)\rightarrow Cr_2S_3 (s)+6H^+ (aq)$

Thirdly, nickel(II) cation displaces hydrogen forming nickel sulfide:

$Ni^{2+}(aq)+H_2S(aq)\rightarrow NiS (s)+2H^+ (aq)$

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