Introduction to Chemical Reactions (Spring 2023)

Math Response

Warm-Up

04/12:

(Ten Minutes)

How many grams of NaOH

are in 2.4 x 10^25 molecules

(aka particles) of NaOH?

Remember to submit a photo to Schoology!

Type answer here

Correct Answer: 1600

Deg^°

Rad

Multiple Choice

Does a chemical reaction occur when we blend bananas for a smoothie?

• Yes(?)

• No(!)

Multiple Choice

Does a chemical reaction occur when we boil an egg?

• Yes(!)

• NO(?)

Multiple Choice

Look at this equation,

Which items are the reactants?

Flour + Water + Eggs -> Cake

• Cake

• Flour, Water and Eggs

• Just the Water

• Just the Flour and Eggs

Open Ended

Share one everyday reaction that you think would be considered a chemical change?

Multiple Choice

Izzy is preparing a boiling pot of water and throws in salt for taste. The salt quickly disappears and the water becomes clear again. Is this a sign of a chemical reaction?

• Yes

• No

Multiple Choice

Julien wants to make a late night snack, but cannot turn on the lights without waking his parents. He opens jars at random and guesses which is peanut butter and jelly based on the smell. Is this a sign of a chemical reaction?

• Yes

• No

Multiple Choice

Greg is making s'mores in his backyard with his brothers. He was distracted by his brother's story and smelled burning. When he pulled back his stick his marshmallow was extra toasty. Is this a sign of a chemical reaction?

• Yes

• No

Multiple Choice

Lucille goes to a party and is given a glow stick. When she cracks the glow stick it slowly begins to brighten. Is this a sign of a chemical reaction?

• Yes

• No

• Maybe

Open Ended

Warm-Up: 04/17

Below, type out your answer for the following questions. Use complete sentences.

Share your answers with your team as needed.

Thinking back on our Rust reaction experiment...

1. Look up the simple definition of oxidation. Was rusting iron an example of an oxidation reaction?

2. What role did H₂O₂ [Hydrogen Peroxide (common name) / Dihydrogen Dioxide (formula name)] play in this experiment?

Drag and Drop

Select the following option that makes the most sense.

William decides to buy new tires (4 per car), new windshield wipes (1 per car) and new floor mats (2 per car) for all three of his family's cars. Try to balance the equation below.

​

Placeholder

Tires + ​

Placeholder

Wipes + ​

Placeholder

Mats -> 3 Cars

Drag these tiles and drop them in the correct blank above

12

3

6

4

2

1

Drag and Drop

How would you balance out this recipe:

Each sandwich requires 2 slices of ham, 1 slice of cheese, 3 pickles and 2 slices of bread. Your friends are coming over so you need to make 7 sandwiches.

Here is the equation:

2 Ham + 1 Cheese + 3 Pickle + 2 Bread -> 1 Sandwich



Complete the new equation:

​

Placeholder

Ham + ​

Placeholder

Cheese + ​

Placeholder

Pickle + ​

Placeholder

Bread -> 7 Sandwiches

Drag these tiles and drop them in the correct blank above

14

7

21

2

1

3

4

18

20

8

Multiple Choice

In the sandwich example, was the number placed in front of the item the Coefficient or the Subscript?

• Coefficient

• Subscript

Multiple Choice

How many atoms of each element are there in this molecule?

4Si₂H₃

• 8 Si

  12 H

• 6 Si

  10 H

• 10 Si

  14 H

• 4 Si

  14 H

Multiple Choice

How many atoms of each element does this contain?

2H₂SO₄

• 4 H

  2 S

  8 O

• 4 H

  2 S

  4 O

• 8 H

  4 S

  4 O

• 2 H

  4 S

  8 O

Multiple Choice

How many atoms of each element?

3Ca(OH)₂

• 3 Ca

  6 O

  6 H

• 3 Ca

  2 O

  2 H

• 6 Ca

  3 O

  3 H

• 9 Ca

  4 O

  4 H

Multiple Choice

How many atoms of each element?

2Al₂(SO₄)₃

• 4 Al

  6 S

  24 O

• 4 Al

  6 S

  18 O

• 4 Al

  3 S

  12 O

• 2 Al

  6 S

  24 O