Question 4 (1 point)

Question

Question 4 (1 point)
LAB 1: ALKA SELTZER REACTION

PROCEDURE:
1. Watch this video.

2. Write down your observations in a chart like the one below to answer the following 4 questions correctly.

Data Table:

Flasks	Observations
NaHCO3 before reaction	
HCl before reaction	
HCl Flask DURING reaction	
HCl Flask AFTER reaction

Question: How did you observe NaCl being formed as a product/after the reaction?

a
It formed into solid salt structures.
 b
There was foaming as NaCl dissolved.
 c
There were bubbles of gas in the reaction.
 d
All of the above were signs of NaCl being formed.
Question 5 (1 point)
From the same video as question #2, how did you observe carbon dioxide being formed as a product?

a
A solid precipitate was formed.
 b
Gas bubbles formed and bubbled through the flask.
 c
A color change occurred.
 d
All of the above are signs that carbon dioxide formed.
Question 6 (1 point)
What would happen with the lab IF rather than powder NaHCO3 we used a whole alka seltzer tablet? Remember it would have the same chemical make up, but have a smaller surface area.

a
The rate of the reaction would speed up.
 b
The rate of the reaction would slow down.
Question 7 (1 point)
   the surface area, increases the reaction rate.

Word Bank:
DecreasingIncreasing
Blank 1: 
Question 8 (1 point)
What would happen with the lab IF we warmed up our hydrochloric acid (HCl) before doing the experiment?

a
The rate of the reaction would speed up.
 b
The rate of the reaction would slow down.
Question 9 (1 point)
LAB 2- BAKING SODA REACTION WITH VINEGAR
Introduction:

The fizzing that is seen when an Alka-Seltzer tablet is dropped in acid is the same sort of fizzing reaction that can be seen when baking soda is mixed with vinegar. The chemical equation is shown below. You will be watching the lab from this video OR completing the lab for 5 points extra credit.

*If you're doing the lab for extra credit, you will need to submit a link to your copy of the completed lab document on the last question of this portfolio AND a picture of yourself (or a card with your name and date) with your lab set up.

Question to answer: If this experiment is like the first lab, what do you think the third product being formed is that fills up the balloon?

a
A second solid neutralized compound
 b
Carbon dioxide as a gas
 c
Baking soda again in its reactant form
Question 10 (1 point)
As both these experiments take acids and bases and form neutralized compounds, would the hydrochloric acid (HCl) and the vinegar, which both donate hydrogen ions, be the acid or the base?

**If you need a refresher on acids and bases, here is a Khan Academy article to help**

a
Acid
 b
Base
 c
Neither
Question 11 (1 point)
Which of the following was NOT one of the observations from the labs that indicated a chemical reaction was occurring?

a
bubbles
 b
gas forming
 c
color change
 d
All of the above was observed signs of a chemical reaction
Question 12 (1 point)
If the water product is formed with the hydrogen ion from the acids, what ion do the bases donate to form H₂O, water?

a
OH+
 b
H+
 c
H-
 d
OH¯
Question 13 (1 point)
If we cooled down the vinegar to almost freezing before adding the baking soda, the reaction rate would increase and the reaction would go faster.

True
 False
Question 14 (1 point)
   the temperature, increases the reaction rate.

Word Bank:
DecreasingIncreasing
Blank 1: 
Question 15 (1 point)
LAB 3- RATE OF REACTION TIME WITH CONCENTRATE

Hydrochloric acid and Sodium thiosulfate produce a precipitate. Watch this video and answer how does INCREASING the concentration of reactants affect the rate of reaction?

a
It increased the rate of the reaction
 b
It slowed down the rate of reaction
 c
It did not affect the rate of reaction
Question 16 (1 point)
LAB 4 - REACTION RATE WITH CONCENTRATION

Watch this video, which glass had the faster reaction rate?

a
The glass with the vitamin added in powder form
 b
The glass with the vitamin added as a whole tablet
Question 17 (1 point)
The powder had greater surface area than the tablet, therefore had more area to react faster.

True
 False
Question 18 (1 point)
  the concentration, increases the reaction rate.

Word Bank:
DecreasingIncreasing
Blank 1: 
Question 19 (2 points)
What are 3 ways you can increase the rate of reaction in experiments? **You need to list all three to get full credit**

Your answer:

GPT-4o mini · Answer

Here are your answers organized according to the questions you've listed:

Data Table: Observations

| Flasks | Observations | |--------------------------------|----------------------------------------| | NaHCO3 before reaction | White, powdery substance, no visible change | | HCl before reaction | Clear, colorless liquid | | HCl Flask DURING reaction | Bubbling and fizzing, gas released | | HCl Flask AFTER reaction | Some residue at the bottom, possibly NaCl formed |

Question Responses:

Question 4:
How did you observe NaCl being formed as a product/after the reaction?
Answer: d. All of the above were signs of NaCl being formed.

Question 5:
How did you observe carbon dioxide being formed as a product?
Answer: b. Gas bubbles formed and bubbled through the flask.

Question 6:
What would happen with the lab IF rather than powder NaHCO3 we used a whole alka seltzer tablet?
Answer: b. The rate of the reaction would slow down.

Question 7:
Blank 1: Increasing

Question 8:
What would happen with the lab IF we warmed up our hydrochloric acid (HCl) before doing the experiment?
Answer: a. The rate of the reaction would speed up.

Question 9:
If this experiment is like the first lab, what do you think the third product being formed is that fills up the balloon?
Answer: b. Carbon dioxide as a gas.

Question 10:
Are hydrochloric acid (HCl) and vinegar acids or bases?
Answer: a. Acid

Question 11:
Which of the following was NOT one of the observations from the labs that indicated a chemical reaction was occurring?
Answer: d. All of the above was observed signs of a chemical reaction.

Question 12:
If the water product is formed with the hydrogen ion from the acids, what ion do the bases donate to form H₂O, water?
Answer: d. OH¯

Question 13:
If we cooled down the vinegar to almost freezing before adding the baking soda, the reaction rate would increase and the reaction would go faster.
Answer: False

Question 14:
Blank 1: Increasing

Question 15:
How does INCREASING the concentration of reactants affect the rate of reaction?
Answer: a. It increased the rate of the reaction.

Question 16:
Which glass had the faster reaction rate?
Answer: a. The glass with the vitamin added in powder form.

Question 17:
The powder had greater surface area than the tablet, therefore had more area to react faster.
Answer: True

Question 18:
Blank 1: Increasing

Question 19:
What are 3 ways you can increase the rate of reaction in experiments?
Your answer: 1. Increase the concentration of the reactants. 2. Increase the temperature of the reactants. 3. Increase the surface area of the solid reactants (e.g., use powdered substances instead of whole ones).

Feel free to let me know if you need further clarification or more help!