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One example is the reaction between the aqueous solutions lead nitrate, Pb(NO3)2 and potassium chloride, KCl. They react to form solid (a precipitate) lead chloride, PbCl2, and aqueous potassium nitrate, KNO3. The balanced equation is
Pb(NO3)2(aq) + KCl(aq) ---> PbCl2(s) + KNO3(aq)
What else can I help you with?
Which of the following is the most likely a sign that a chemical change has happened?
D.Two liquids are mixed at room temperature and a gas forms.
What is an example of the formation of a precipitate?
Formation of a precipitate is evidence of a chemical reaction.
Is the formation of a solid a chemical change?
Yes, if it occurs as the result of a chemical reaction. For example, if two clear colorless solutions form a white precipitate (solid) when mixed, that would be an example of a chemical change. The formation of a solid from freezing is a physical change.
How do you know that a chemical change is happening in the flask?
signs of a chemical reaction occurring include: -formation of a gas (bubbles) -change in color -transfer of energy (change in temperature, giving off light) -formation of a precipitate (if a solid forms out of solution)
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 an formation of precipitate an indication of a chemical change?
a
What are 4 indicators to identify a chemical change has taken place?
Precipitate (solid matter formation), Temperature change, Gas formation, and color change.
Is an indication of chemical change?
Not necessarily. If the color change is in the presence of 1 or all of the following:a precipitate (insoluable substance)a gas being produced (bubbling)energy being released or absorbed by chemicals,then it is indicating a chemical change.
What is called formation of is an indication of a chemical change?
You think to the formation of a new compound with a different smell, color, appearance, possible the release of a gas, a precipitate, etc.
What formation is an indicator of chemical change?
precipitate
What do you look for in a chemical change?
change in color, formation of gas and precipitate ;))
What is a sign of a reaction oh a chemical change?
a colour change, a gas produced or a precipitate (new substance/solid) formed.
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.
Which of the following is the most likely a sign that a chemical change has happened?
D.Two liquids are mixed at room temperature and a gas forms.
What are the six types of evidence for a chemical change?
Types of evidence for chemical change include: A gas is evolved. A precipitate appears or disappears. Heat may be evolved or absorbed. A color change occurs. A substance disappears.
How can you know this is a chemical reaction?
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
What are some clues that an object has undergone a chemical change?
Color change, precipitate formation, gas formation, temperature change
