Exothermic & Endothermic
In an exothermic reaction, does the temperature of the surroundings increase or decrease?
what would happen when iron is exposed to oxygen/water?
rusting
state the word equation for metal+sulfuric acid
metal sultfate + hydrogen
what would happen when we burn magnesium?
it will emit light
word equation when magnesium reacts with hcl
Magnesium + Hydrochloric acid → Magnesium chloride + Hydrogen
In an Endothermic reaction does the temperature of the surroundings increase or decrease?
decrease
What is INERT?
when a metal is unreactive
in ' zinc + sulfuric acid -> zinc sulfate + hydrogen ' which is the product?
zinc sulfate + hydrogen
what are signs that a chemical reaction has taken place
light emission, gas formed, new substance formed, etc.
word equation for rusting?
iron+oxygen+water->hydrated iron oxide
TRUE/FALSE: during an endothermic reaction heat is released to the surroundings
FALSE
which metal that we learnt is Inert?
Gold
word equation of metal & nitric acid
metal + nitric acid -> metal nitrate + hydrogen
is boiling a chemical change? why?
no bcs it doesnt create a new substance although it produce bubbles
word equation for reaction between sodium and water
Sodium + Water → Sodium hydroxide + Hydrogen
What happens to the energy (heat) during an exothermic reaction
it gets released
mention 2 ways you can prevent rust
painting, galvanizing, oiling, etc
what is the acid in the product : zinc chloride
hydrochloric acid
A chemical reaction is a process where one or more substances (reactants) change to form new substances (products) with different properties.
Zinc + Hydrochloric acid → Zinc chloride + Hydrogen : whats the metal in this reaction?
zinc
Mention 1 example for each endothermic and exothermic reactions
respiration, photosynthesis
list all the metals from MOST reactive to LEAST reactive
Potassium, Sodium, Calcium, Magnesium, Zinc, Iron, Copper, Silver, Gold
state word equation of iron & water & oxygen
iron + water + oxygen -> hydrated iron oxide
What are reactants and products?
Reactants: Substances that start a chemical reaction.
Products: Substances formed as a result of the reaction.
Metal + dilute acid ->???
metal salt + hydrogen