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Chemical Re Test Rev
| Question | Answer |
|---|---|
| a starting substance in a chemical reaction is called a.... | reactant |
| an ending substance is called a...... | product |
| what two points must happen for a successful collision? | sufficient force and molecules must be aligned |
| what are the four factors that affect reaction rates?Explain what will cause an increase in reaction rate for each of the four factors | temperature, concentration, surface area and catalyst |
| Triangle | heat |
| HCI | a catalyst |
| S | solid |
| L | liguid |
| G | gas |
| aq | dissolves in water |
| what is the difference between l and aq? | l indicates liquid and aq was a solid dissolved in water |
| what is an exothermic reaction? | release of heat light and energy as product temperature increases |
| what is an endothermic reaction? | absorb heat light and energy as reactant temperature decreases |
| synthesis | a + x-> AX To reactants form one product. |
| decomposition | ax-> a + x One reactant forms 2 products |
| single displacement | A + bx-> ax + b element replaces similarly charged element |
| chemical equations must be balanced to satisfy the law of | conversation of mass |
| when 127 g of copper reacts with 32 g of oxygen gas to form copper (II) oxide, no copper or oxygen is left over How much copper (II) oxide is produced? | 127 + 32 = 159g |
| how can you verify that the law of conservation of mass holds true if you perform a chemical reaction is which as is a product? | Trap the gas and measure mass and include it in products of mass |
| Synthesis: Mg + P --> | 3mg +2p --> Mg3p2 |
| Decomposition: K202 --> | K202 ---> 2K + O2 |
| SIngle Displacement: Ag + Ca( Oh)2 ----> | No reaction |
| Double Displacement: KOH + ( Nh4)3P04 ----> | BaS + (NH4)3PO4-->K3P04 + 3NH4OH |
| What are diatomic elements? What are the seven elements found in diatomic form? | elements never found freely in nature. Br2 I2 N2 Cl2 H2 O2 F2 |
| What type of reaction is KCI + Al2(SO4)3 --> Alcl3 + K2S04 | Double replacement |
| What type of reaction is HNO3 + Ca(Oh)2 -> HOH + Ca(No3)2 | double replacement |
| What type of reaction is CaCO3 --> Cao + Co2 | decomposition |
| What type of reaction is N2 + 3mg ---> Mg3N2 | synthesis |
| Which is stronger, 1m hydrochloric acid or 6m hydrochloric acid? | 6m HCI stronger |
| What is the first thing you should do if you spill acid in lab? | tell teacher |
| How would the teacher clean up a spill of 6m HCI on a table? HINT nuetralize | any base gotta neutralize it |
| If a student spills acid on themselves, what could they look at to determine what the appropriate first aid measures are | MSDS sheet in lg white binder |
| If a student breaks an empty test tube, where does the broken glass get placed why? | Broken glass trash -> protects custodians |
| If a student looks at the MSDS for hydrochloric acid and its has a health rating of 3 and a flammability rating of 1 what is bigger danger getting hurt with acid or having it catch fire | Getting hurt with acid |
| Bubbles: 0 sooo the rate of gas evolution and catalytic activity is | none and none |
| Bubbles:25 sooo the rate of gas evolution and catalytic activity is | fast and high |
| Bubbles: 5 sooo the rate of gas evolution and catalytic activity is | slow and low |
| What is the most effective catalyst for the decomposition of hydrogen peroxide? | Fe(no3)3 |
| Can CACl2 still be considered a catalyst for the decomposition reaction? why? | Yes because it still causes decomp. at a rate over that of NACI but not an effective catalyst |
Created by:
murphy1717