In a lab, silver nitrate, agno₃, is dissolved in water until no solid is observed in the container. then, a solution of sodium chloride, nacl, is added to the container. when you combine these aqueous solutions, there is no noticeable change in temperature; however, a solid precipitates and there is a slight change of color. which statements about the lab experiment involving silver nitrate and a sodium chloride solution are true?

a. formation of a solid indicates that a chemical reaction occurred

b. the initial disappearance of silver nitrate in water indicates a chemical reaction occurred

c. the color change of the solution indicates a chemical reaction occurred

d. a chemical reaction occurred when silver nitrate was added to water

e. a chemical reaction occurred when the solutions were combined

f. the lack of temperature change indicates a chemical reaction didn't occur

The answer to your question is: A, C, E

Explanation:

After reading the information given, we can conclude that both reactants react to form a new solid product and another product that do not precipitate.

The reaction is:

                         AgNO₃ + NaCl   ⇒      AgCl  +  NaNO₃

a. Formation of a solid indicates that a chemical reaction occurred  This option is correct, precipitation indicates that a changed occurred in the solution due to a chemical reaction.

b. The initial disappearance of silver nitrate in water indicates a chemical reaction occurred  No, what is happing is that silver nitrate is dissolving in water, this process is a physical change because matter do not change its nature.

c. The color change of the solution indicates a chemical reaction occurred  This option is true, when a color appears suggest the formation of a new product.

d. A chemical reaction occurred when silver nitrate was added to water

This option is not correct, in this process silver nitrate is dissolving in water but it is not a chemical reaction because matter does not change is nature.

e. A chemical reaction occurred when the solutions were combined  This option is true because silver nitrate and sodium chloride react to form a new product (solid formation and change in color).

f. The lack of temperature change indicates a chemical reaction didn't occur This is false, some reactions do not need a change of color to happen.

i think it is d. e because the next one is igneous.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.