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What else can I help you with?
When you fix broken chair what physical change occurred?
hahahahhaa
When do you say that a change is chemical?
A chemical change has occurred when a new substance is formed. Characteristics of this include a color change, precipitate is formed or it bubbles meaning a gas has formed.
What are the four occurrences indicate a chemical reaction has occurred?
A chemical reaction can result in any or all of the following: - a change in temperature (up or down) - a change in color - a smell that wasn't there before - the formation of bubbles (indicating the production of a gas) - the formation of a precipitate
Is broken pieces a sign that a chemical change has occured?
Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.
What will you see during a chemical change?
Some of the evidence that indicates that a chemical change has occurred include a change in color, the formation of a precipitate from two solutions, gas bubbles, burning, change in temperature.
When calcium carbonate and hydrochloric acid react bubbles form. How do you know a reaction occurred?
You can tell that a reaction occurred because you observed the formation of bubbles, which indicates the release of a gas (carbon dioxide) as a product of the reaction between calcium carbonate and hydrochloric acid. The appearance of bubbles is a clear sign of a chemical change taking place.
What is a sign that a chemical change has occurred smoke broken pieces change in shape or change in state?
The production of smoke from something burning would be a sign of a chemical change. Broken pieces, change in shape, or change in state are all physical changes.
What clues can you use to identify a chemical change?
Characteristics of a chemical change can include a temperature change, a color change, the production of bubbles, the production of a precipitate, and a smell.
What type of change occurred in the acetic acid solution when you placed the calcium carbonate chip in it?
it bubbles up. and at that point the calcium carbonate under goes a change in color
How do you know a reaction occurred?
A reaction has occurred when there are observable changes, such as a color change, the formation of a precipitate, the evolution of gas (bubbles), or a temperature change (exothermic or endothermic). Additionally, if the properties of the original substances change and new substances with different properties are produced, it indicates that a chemical reaction has taken place. Observing these signs can confirm the occurrence of a reaction.
Do bubbles indicate a physical or chemical change?
Not always but they can. They may simply be an indication of a phase change, as when water boils. This is usually counted as a physical change rather than a chemical change. But if you add baking soda to vinegar, you will see bubbles as a result of a chemical change.
What is evidence that a chemical change has happened?
Evidence of a chemical change includes a change in color, formation of a precipitate, evolution of gas bubbles, or a change in temperature. Additionally, if the substance cannot be easily reversed back to its original form, it is likely a chemical change has occurred.
