Chemical reactions
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| Chemical reactions take place when? | Bonds between atoms in one compound break and the atoms reform bonds with different atoms from another compound
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| John Dalton's atomic theory states what? | chemical reactions do not create nor destroy matter, they only rearrange bonds between atoms
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| Word equations do what? | spell out the elements, they don't use symbols
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| To add more information to the equation you can do what? | You can indicate the physical states of substances by putting a symbol after each formula
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| Where is a catalyst's formula written in a chemical equation? | above the arrow in a chemical equation
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| A catalyst is neither what? | a reactant nor product
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| An unbalanced equation does not indicate what? | the quantity of the reactants needed to make the product
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| The law of conservation explains what? | a part of Dalton's atomic theory
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| When a simple binary compound breaks down you know what? | that the products must be the constituent elements
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| It is usually what to predict the product of decomposition reactions? | difficult
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| How can you identify a single-replacement reaction? | Noting both the reactants and the products consist of an element and a compound.
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| Whether a metal will displace another metal from a compound depends on what? | The relative re activities of the two metals
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| Double replacement reactions are also called what? | Double-displacement reactions
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| Double replacement reactions usually take place in what? | in aqueous solutions and often produce a precipitate, a gas, or a molecular compound like water.
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| For a double replacement reaction to occur, one of the following must be true: | One of the products is only slightly soluble and precipitates from solution, one of the products is a gas, one product is a molecular such as water
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| A combustion reaction always involves what as a reactant? | oxygen
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| The other reactant of a combustion reaction is what? | hydro-carbon
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| What can be products of combustion reactions? | Elemental carbon ( soot) and toxic carbon monoxide gas
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| Combustion equations can also be classified as what? | Combination reactions
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| What are the products of most combustion reactions? | Carbon dioxide and water
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| Combination reaction general equation | R+S arrow RS
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| General equation Decomposition Reaction | RS arrow R+S
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| General equation Single replacement reaction | T+RS arrow TS+R
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| What must happen for a single replacement reaction? | the element that is displaced must be less active then the element that is doing the displacing
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| Double-replacement reaction equation | R+S- +T+U- arrow R+U- +T+S-
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| What does a net ionic equation show? | only those particles involved in the reaction and is balanced with respect to both mass and charge
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| How can you predict the formation of a precipitate in a double-replacement reaction? | By using the general rules for solubility of ionic compounds, you can predict the formation of a precipitate
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| Aqueous solution take place in what? | water
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| A spectator ion can be though of as what? | only watching a reaction, not participating
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| Of the five types of reactant which ones can be written as net ionic equations? | single- and double replacement reactions
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| A precipitate forms when which aqueous solutions are mixed? | sulfate (Na2SO4) and barium nitrate (Ba(N03))
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| A reaction may fit equally well into what two categories? | combination reaction/synthesis reaction
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| In all combination reactions, the product is usually what? | a single substance
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| What is the opposite of a combination reaction? | decomposition reactions
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| Decomposition reactions involve only what? | one reactant and two or more products
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| The products of decomposition reactions can be what? | any combination of elements and compounds
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