short answer questions: 11. what do you expect to see inside the bottle shown here? (1 point) 12. during a…

short answer questions: 11. what do you expect to see inside the bottle shown here? (1 point) 12. during a lab experiment, you mix hno₃ with cu powder. what four elements (symbols are fine) would you expect to have in your products? (2 points) 13. potassium iodide, ki(aq), is added to lead nitrate, pb(no₃)₂(aq), resulting in kno₃(aq) and a yellow solid. circle the yellow solid from the list below (1 point) a. pbi₂(aq) b. pbi₂(s) c. pb(no₃)₂(aq) d. ki(s) explain why you picked that yellow solid. (2 points) 14. which 3 elements in the table below would you expect to find in the same group on the periodic table? circle the elements. (2 points) element description reactivity chlorine compound element q violet or dark gray, nonmetal, solid reacts slowly with water qcl(s) element r red - brown, nonmetal, liquid reacts slowly with water rcl(g) element t yellowish - green, nonmetal, gas reacts slowly with water tcl(g) element x colorless, nonmetal, gas does not react with water xcl₃(l) explain your thinking (2 points)

short answer questions: 11. what do you expect to see inside the bottle shown here? (1 point) 12. during a lab experiment, you mix hno₃ with cu powder. what four elements (symbols are fine) would you expect to have in your products? (2 points) 13. potassium iodide, ki(aq), is added to lead nitrate, pb(no₃)₂(aq), resulting in kno₃(aq) and a yellow solid. circle the yellow solid from the list below (1 point) a. pbi₂(aq) b. pbi₂(s) c. pb(no₃)₂(aq) d. ki(s) explain why you picked that yellow solid. (2 points) 14. which 3 elements in the table below would you expect to find in the same group on the periodic table? circle the elements. (2 points) element description reactivity chlorine compound element q violet or dark gray, nonmetal, solid reacts slowly with water qcl(s) element r red - brown, nonmetal, liquid reacts slowly with water rcl(g) element t yellowish - green, nonmetal, gas reacts slowly with water tcl(g) element x colorless, nonmetal, gas does not react with water xcl₃(l) explain your thinking (2 points)

Answer

Explanation:

Step1: Identify copper sulfate content

The bottle is labeled $\text{Cu}_2\text{SO}_4(a)$. Since the common form is copper (II) sulfate $\text{CuSO}_4$, assuming it's a mis - label and it's copper (II) sulfate solution, we expect to see a blue - colored aqueous solution of copper (II) sulfate inside the bottle as $\text{Cu}^{2 + }$ ions in solution give it a blue color.

Step2: Analyze reaction of $\text{HNO}_3$ and $\text{Cu}$

The reaction between copper ($\text{Cu}$) and nitric acid ($\text{HNO}_3$) can be a redox reaction. The products will contain the elements from the reactants. Copper ($\text{Cu}$), hydrogen ($\text{H}$), nitrogen ($\text{N}$), and oxygen ($\text{O}$) will be present in the products.

Step3: Determine the yellow solid in the reaction

The reaction between potassium iodide ($\text{KI}$) and lead nitrate ($\text{Pb}(\text{NO}_3)_2$) is a double - displacement reaction. The balanced chemical equation is $2\text{KI}(aq)+\text{Pb}(\text{NO}_3)_2(aq)=\text{PbI}_2(s) + 2\text{KNO}_3(aq)$. Lead iodide ($\text{PbI}_2$) is a yellow solid. So the answer is B. $\text{PbI}_2(s)$ because it is an insoluble product (a precipitate) according to solubility rules (halides of lead are insoluble except for some exceptions not relevant here).

Step4: Identify elements in the same group

Elements in the same group of the periodic table have similar chemical properties. Elements Q, R, and T are all non - metals that react slowly with water and form similar chlorine compounds ($\text{QCl}(s), \text{RCl}(g), \text{TCl}(g)$). They likely belong to the same group (halogens or a similar non - metal group). Element X is different as it does not react with water and has a different chlorine compound ($\text{XCl}_3(l)$). So we circle Element Q, Element R, and Element T. They have similar reactivity patterns with water and similar bonding with chlorine, indicating they are in the same group.

Answer:

  1. A blue - colored aqueous solution of copper (II) sulfate.
  2. $\text{Cu}$, $\text{H}$, $\text{N}$, $\text{O}$
  3. B. $\text{PbI}_2(s)$
  4. Circle Element Q, Element R, Element T.