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There are 6 indicators of a chemical reaction: 1) change in color ex: iron (grey) +oxygen (colorless) = rust (orange) 2) change in taste ex: burnt toast 3) heat is added or released ex: cooking food (heat added) 4) change in smell ex: rotting milk 5) gas is formed ex: baking soda + vinegar = "mini volcano" 6) formation of a solid ex: rotted milk has clumps
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What three ways would let you know that a reaction had taken place?
1. Evolution of gas. 2.Formation of precipitate(solid sediment). 3. Change in temprature of reaction vessel
When two or more substances combine in a chemical reaction to form another substance the reaction that has taken place is?
If 2 or more reactants produce a single product, then a synthesis reaction has occured.
2 colorless liquids produce a white precipitate when they are mixed together is it a chemical change or a physical change?
Chemical change. The formation of a precipitate is one indication that a chemical reaction has taken place.
What kind of chemical reaction needs to take place so that methanol can be synthesized?
The most common reaction is:CO + 2 H2 = CH3OH
What is the chemical reaction take place in refining of silver from silver nitrate solution involving displacement of copper metal?
The chemical reaction is:Cu + 2 AgNO3 = 2 Ag + Cu(NO3)2
What three ways would let you know that a reaction had taken place?
1. Evolution of gas. 2.Formation of precipitate(solid sediment). 3. Change in temprature of reaction vessel
When two or more substances combine in a chemical reaction to form another substance the reaction that has taken place is?
If 2 or more reactants produce a single product, then a synthesis reaction has occured.
Which are 4 indications of chemical reaction has occurred?
The indicators of a chemical reaction are :- 1. Change in colour 2. Change in temperature 3. Evolution of a gas 4. Formation of a precipitate
What are some signs that indicates a double displacement reaction has taken place?
1) Formation of a precipitate 2) Usually there is a colour change. 3)Neutralization reactions (also a double displ. reaction) involving an acid and a base form water which is a clue.
2 colorless liquids produce a white precipitate when they are mixed together is it a chemical change or a physical change?
Chemical change. The formation of a precipitate is one indication that a chemical reaction has taken place.
What muslim country are they in in taken 2?
The movie Taken Two takes place in Islamic country.
Where did the evacuation of world war 2 take place?
they were taken in may different places mainly in the countrysides and some villages a popular place where it was taken place was dunkirk.
Will a reaction take place if you add Ca and H2O?
yes if you mix anything with 2 hydrogen atoms and 1 oxagen atom than a reaction will take place
What are four types of evidence that indicate that a chemical reaction may have taken place?
1. A colour change occurs 2. A gas is evolved. 3. A precipitate is formed. 4. A large energy change occurs.
What topography is in general?
the art of representing on a map or chart the physical features of a place as mountains , lakes , canals usually with indications of elevation. 2) the physical features of a region.
What would be the reaction if 2 neutron bombs and 2 nuclear bombs exploded in the same place?
'BOOM'
What kind of chemical reaction needs to take place so that methanol can be synthesized?
The most common reaction is:CO + 2 H2 = CH3OH
