Question

What happens when hcl is added to tartrazine?

Answer 1

Hydrochloric acid reacts with marble, which is made up of calcium carbonate, to form calcium chloride, water, and carbon dioxide.

2HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l)+CO2(g)

The carbon dioxide can then be passed to limewater to test (which would turn it into calcium carbonate again)

Answer 2

Hey mate here's your answer

As H2SO4 is a oxidising acid…

Chlorine gas has on oxidation number of zero

Chlorine in compounds with other elements usually has an oxidation number of -1…Therefore, when reaction takes place ,HCl may be oxidized to Cl2 and further or a mixture of partially oxidised products may be formed. The strength of reaction and the extent of oxidation will depend on concentration of H2SO4 both hydrochloric acid and sulphuric acid are just ions dissolved in water at a certain percentage (i.e. 30%) So, mixing them will just be an aqeous solution, say 15%HCl and 20%H2SO4, a stronger or a weaker acid depending on the ratios you mix it in and the original concentration of each. They should not interact since water's hydrogen bonds would just split up the molecules into ions H+, Cl-, and SO4(2-). actually it turns into a wax like substance, but my ratios were 30% HCl and unknown H2SO4, 75-90% strength. In short it releases hydrogen chloride gas.

Hope it helps you