c hemical m ixing : a n exploration of k itchen chemistry by: hannah jean ward
TRANSCRIPT
CHEMICAL MIXING:AN EXPLORATION OF KITCHEN CHEMISTRY
By: Hannah Jean Ward
SCIENTIFIC QUESTION:
My question was:“What happens when kitchen chemicals get mixed together?”(My dad helped me pick out the chemicals.)
My hypothesis was:“It will cause a chemical reaction.”“It will bubble and explode!”“The chemicals will mix and form something new.”“Different things will happen if you mix different chemicals.”
WHAT IS A KITCHEN CHEMICAL? Hannah: “Chemicals can be many different things. Little kids should not mix things without a grown up.”
What kitchen chemicals did we look at? We used:
• Water
• Olive oil
• Red wine vinegar
• Sea salt
• Baking soda
WHAT DID WE DO?
What should we mix them in? How should we mix them? How much stuff should we mix up?• A glass – so we can use a small amount, so we can observe it because it’s clear• We should use a spoon. Mix them for 10s. • A couple spoonfuls will do.
What should we observe?What are they like before they are mixed – how they feel, their color, whether they are liquid or solid, if and how they smell.
Does anything happen when we mix them?
What does the mixed-up stuff look like?
HOW DID THESE KITCHEN CHEMICALS START OUT?
Chemical Solid or Liquid
Feel Smell Color Other observations
Water Liquid Smooth, slippery Like nothing Clear Some tiny air bubbles
Red Wine Vinegar
Liquid Very wet, smooth and slippery
Sour Red
Olive oil Liquid Smooth, slippery, and greasy
Like something, kinda like olives
Yellow-ish green
Thicker than other liquids
Sea Salt Solid Chunky, hard, not sticky
Like nothing White Little bit clear
Baking Soda Solid Soft, chunky Like nothing White
SO WHAT HAPPENED?Mixture Observations during mixing Observations of final mixture
Water and vinegar Nothing really Smells like vinegar, still clear, mixed well, pink-ish in color, no changes
Water and oil Nothing really Smells like the oil, oil stayed on top, greenish on top, didn’t mix well
Water and baking soda
Turned white Still some stuck to spoon, more dough-like, baking soda on the bottom, mostly stayed separate
Water and salt Nothing Don’t mix well, salt turned clear
Vinegar and baking soda
“A chemical reaction!”, turned brown and white, it bubbled and fizzed. “Almost fizzed all over the place!”
Brown, some slimy paste at bottom, bubbles mostly gone
Vinegar and oil Nothing really. Tasted it and felt sick, really harsh. Didn’t mix well. Smells like vinegar.
Vinegar and salt Nothing really. The salt stayed on the bottom.
Red, but the salt stayed white. Smells like vinegar
Oil and salt Nothing really. Yellow with a bunch of crystals. Didn’t mix very well.
Oil and baking soda Became pasty. Yellowish-white, can’t see through it anymore. Smells like oil. Still a liquid.
Salt and baking soda Nothing really. It camouflaged the salt in the baking soda, can’t see it anymore. Smooth with hard bumps…salt.
SOME OF THE MORE INTERESTING MIXTURES:
Baking soda and red wine vinegar Olive oil and red wine vinegar
Olive oil and baking soda
Different things
happen!
WHAT DID WE LEARN?
1. That baking soda and vinegar cause a chemical reaction! It bubbled but did not explode. (whew!)
2. Some things mixed well, but some things did not. In some cases the mix ended up different than the starting stuff.
3. You need to be careful when you mix things because you never know what’s going to happen.
The End!