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When a substance is added to water and bubbles form how can you confirm the type of change that took place?
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What has to be added to a substance to cause a phase change?
Heat energy must be added to or subtracted from a substance to cause a phase change.
When acids are added to rocks containing a carbonate bubbles form is this evidence of a physical change or chemical change?
Chemical
Is it true that the properties of a substance change when it is added to a mixture?
yes.true
When drain cleaner is added to water bubbles of hydrogen are produced Is what happens to form the bubbles when the cleaner is added a chemical or physical reaction?
If a gas is produced and it isn't a state change (such as steam bubbles forming), the reaction is a chemical change because the molecular makeup of either the water or the drain cleaner has changed and the hydrogen has been liberated.
What substance can change from a liquid to a gas on its own without energy needing to be added?
water
What has to be added to a substance to cause a phase change?
Heat energy must be added to or subtracted from a substance to cause a phase change.
Is a pane of clear glass a mechanical mixture or solution?
Solution
When sugar is added to tea does the substance change?
No
How can an objects density change?
It can if more of the substance is added to it.
When acids are added to rocks containing a carbonate bubbles form is this evidence of a physical change or chemical change?
Chemical
How will a substance change if energy is added to the liquid at 20 degrees Celsius?
The substance will get hawter
How will the substance change if energy is added to the liquid at 20 degrees celsius?
the substance will get hotter.
Is it true that the properties of a substance change when it is added to a mixture?
yes.true
What is the color of marigold flower indicator when acidic substance is added to it?
No color change is there...
When drain cleaner is added to water bubbles of hydrogen are produced Is what happens to form the bubbles when the cleaner is added a chemical or physical reaction?
If a gas is produced and it isn't a state change (such as steam bubbles forming), the reaction is a chemical change because the molecular makeup of either the water or the drain cleaner has changed and the hydrogen has been liberated.
What state will most likely result if heat is added to a liquid?
It will change into a gas.Adding heat to or removing heat from a system may result in a temperature change and possibly a change of state. A liquid substance needs heat added to it in order to enter a gaseous state. If enough heat is added to a liquid substance it will change into a gas.
What is a substance that resists a pH change when small amounts of acid or base are added?
buffer
