Classify each of the following as a pure substance or a mixture; if it is a mixture, state whether it is heterogeneous
1 answer:
Answer:
(a) Heterogeneous mixture; (b) heterogeneous mixture;
(c) heterogeneous mixture; (d) homogeneous mixture; (e) pure substance.
Explanation:
(a) Concrete
Heterogeneous mixture. Concrete is a mixture of sand, gravel, and crushed stone held together with a cement.
In a heterogeneous mixture, you can see definite boundaries between the various components.
(b) Tomato juice
Heterogeneous mixture. It consists of water, tomato pulp, salt, and other substances.
(c) Marble
Heterogeneous mixture. It consists mostly of CaCO₃, but it usually contains other substances such as mica, quartz, pyrite, and iron oxides.
(d) Seawater
Homogeneous mixture. Seawater is an aqueous solution of NaCl along with other ions like Mg²⁺, Ca²⁺ ,and SO₄²⁻.
(e) Iron
Pure substance. Iron is an element. It consists only of Fe atoms.
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Answer:
Explanation:
Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.
Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.
Only the species which are present in aqueous state dissociate.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
(a)
The balanced molecular equation will be,
The complete ionic equation in separated aqueous solution will be,
In this equation the species present are, are the spectator ions.
Hence, the net ionic equation contains specie is