Fizzy lemonade with baking soda

Type of resource: website, guidelines, video

Web address https://littlebinsforlittlehands.com/fizzy-lemonade-science-project/

Language: English

Description

Experiment with lemon and baking soda to see the reaction they make when mixed.

Scientific concept introduced

Acid, base, chemical reaction

Creative and critical thinking

To explore with substances that can react, gases production and change of color

Mathematical reasoning

To measure the amount of juice and soda needed.

Scientific thinking

To ask questions.

To analyze the differences.

To develop the ability to observe and discover.

Learning how to learn

Motivation to learn and engage.

Additional

Use of hand-eye coordination.

Fizzy lemonade with baking soda

Overall aims

To develop the ability to observe and discover
To enhance the interest of experimenting and manipulating with different aliments and materials.
To know the existence of fizzy chemical reactions
To demonstrate the presence of gases
To develop de sense of taste

Vocabulary – keywords should be understood

reactions, lemonade, sugar, gases, water, bubbles, acids, bases

Expected learning outcomes (operational aims)

To explain a simple chemical reaction
To carry out an experiment
To discover the existence of reaction between bases and acids
To recognize the acid aliments and their properties

STEM skills – to which the learning unit is related to

CORE STEM SKILLS

● Asking questions.
● Designing experiments.
● Drawing conclusions based on results.
● Motivation to learn and engage.
● Relate facts and phenomena.

Teaching methodologies/activity outline

This is simple science to kids who love to explore with the senses. The fizzy lemonade science project is perfect for summer and offer kids the opportunity to explore fizzy chemical reactions with their tongues too.

1- Lest go to see what we need to start the experiment:
Give them the following elements: sugar, water, lemon, baking soda, food coloring, plates, glasses, chopsticks, kid friendly knives and spoons.

2- Prepare and develop the experiment:
The experiment has two parts
1. Let’s see the acid-base reactions: take a lemon and break it in half, on the inside of the lemon and after making some small holes with the wooden sticks, add some soda powder. Immediately, it will be seen how a reaction occurs in which many bubbles come out. You can also add food coloring and see the color changes that occur.

2. Let’s make a lemonade with bubbles: after squeezing the lemon with a simple juicer, add the juice to a few glasses of sugar water and stir everything. Then add some soda powder and taste the mixture.

3- Results of the experiment:

3.1. When a food coloring is added to the lemon it shows a color determined by the acidic environment of the lemon, when soda is added to the mixture the color changes because the medium becomes basic.
3.2. When exposed to a moderately strong acid (lemon acid in this case), soda or sodium bicarbonate decomposes into carbon dioxide (gas) and water, producing a characteristic fizz (bubbles). If baking soda is added to a summer fresh lemonade, kids can feel the bubbles produced in their tongue.

4- Conclusion:
Kids can learn how to make colors change depending on the acid or basic substance they use and make a fuzzy reaction with carbon dioxide bubbles.

With this experiment kids can also work on the sense of taste.

Assessment of learning

Initial evaluation
– Get to know the previous knowledge about acid and bases, gases, chemical
reactions, sense of taste…

Continued evaluation
– Listen, think, create and elaborate explanations of the real phenomena.
– Observe and explore the natural and physical environment, with an attitude of curiosity.
– Use the oral language and gesture to express ideas and feelings.

Final evaluation
– To evaluate the learning objectives.