4. analyze: 1. one way to test what kind of gas is in the cylinder is to use a splint test. a glowing splint…

4. analyze: 1. one way to test what kind of gas is in the cylinder is to use a splint test. a glowing splint is a wooden stick that has been lit on fire and then blown out, resulting in a glowing, red - hot tip. a burning splint is a splint that has a burning tip. the table shows how a splint reacts to some common gases: gas carbon dioxide (co₂) or ammonia (nh₃) oxygen (o₂) hydrogen (h₂) glowing splint goes out ignites (burns) does not ignite burning splint goes out continues to burn small explosion and \pop\ sound a. drag the glowing splint next to the cylinder, and observe. what do you see? b. click reset and click play, and then bring the burning splint to the cylinder. what happens now? c. based on the table above, what gas do you think was produced in this reaction? 5. interpret: turn on show chemical equation. a chemical equation is a shorthand way to describe a chemical reaction. symbols represent the elements: h for hydrogen, o for oxygen, and na for sodium. the reactants are to the left of the arrow, and the products are to the right. for example, the equation h₂ + o₂ → h₂o shows that the reactants hydrogen and oxygen combine to form the product h₂o, or water. a. look at the reaction shown in the gizmo. what are the reactants in this reaction? b. what are the products in this reaction? these symbols represent sodium hydroxide and hydrogen gas. sodium hydroxide is a strong base. (chemicals that contain the hydroxide ion (oh⁻) are bases.) c. how do the products of the reaction relate to the phenol red test and the splint test?

4. analyze: 1. one way to test what kind of gas is in the cylinder is to use a splint test. a glowing splint is a wooden stick that has been lit on fire and then blown out, resulting in a glowing, red - hot tip. a burning splint is a splint that has a burning tip. the table shows how a splint reacts to some common gases: gas carbon dioxide (co₂) or ammonia (nh₃) oxygen (o₂) hydrogen (h₂) glowing splint goes out ignites (burns) does not ignite burning splint goes out continues to burn small explosion and \pop\ sound a. drag the glowing splint next to the cylinder, and observe. what do you see? b. click reset and click play, and then bring the burning splint to the cylinder. what happens now? c. based on the table above, what gas do you think was produced in this reaction? 5. interpret: turn on show chemical equation. a chemical equation is a shorthand way to describe a chemical reaction. symbols represent the elements: h for hydrogen, o for oxygen, and na for sodium. the reactants are to the left of the arrow, and the products are to the right. for example, the equation h₂ + o₂ → h₂o shows that the reactants hydrogen and oxygen combine to form the product h₂o, or water. a. look at the reaction shown in the gizmo. what are the reactants in this reaction? b. what are the products in this reaction? these symbols represent sodium hydroxide and hydrogen gas. sodium hydroxide is a strong base. (chemicals that contain the hydroxide ion (oh⁻) are bases.) c. how do the products of the reaction relate to the phenol red test and the splint test?

Answer

Explanation:

Step1: Analyze gas - splint reactions

Based on the table, if the gas is carbon dioxide or ammonia, a glowing splint goes out. If it's oxygen, a glowing splint ignites. If it's hydrogen, a glowing splint does not ignite.

Step2: Analyze burning - splint reactions

For carbon dioxide or ammonia, a burning splint goes out. For oxygen, a burning splint continues to burn. For hydrogen, a burning splint causes a small explosion and “pop” sound.

Step3: Identify reactants and products

In a chemical equation, reactants are on the left - hand side of the arrow and products are on the right - hand side.

Answer:

A. Answers will vary depending on the actual gas in the cylinder. If it's carbon dioxide or ammonia, the glowing splint goes out. If it's oxygen, the glowing splint ignites. If it's hydrogen, the glowing splint does not ignite. B. Answers will vary depending on the actual gas in the cylinder. If it's carbon dioxide or ammonia, the burning splint goes out. If it's oxygen, the burning splint continues to burn. If it's hydrogen, there is a small explosion and “pop” sound. C. Answers will vary based on the observations in A and B. If the glowing splint ignites and the burning splint continues to burn, it's oxygen. If the glowing splint goes out and the burning splint goes out, it's carbon dioxide or ammonia. If the glowing splint does not ignite and the burning splint makes a “pop” sound, it's hydrogen. 5. A. Answers will vary based on the reaction shown in the Gizmo. Reactants are on the left - hand side of the chemical equation. B. Answers will vary based on the reaction shown in the Gizmo. Products are on the right - hand side of the chemical equation. C. If the product is sodium hydroxide (a base), it can be tested with phenol red (base turns phenol red pink). If hydrogen gas is a product, it can be tested with the splint test as described above.