IPS Exam Study Guide
What I missed on tests
2. Volume of water that does not fill air spaces in sand= Volume of sand and water-volume of dry sand
3. Weight to kilograms-weight/2.2
4. Error from Mass of Gas lab that leads to loss of mass-Water on t-tube that is not on during Mi
5. Percent change in mass-Change in mass/Mi
NO CARELESS MISTAKES!!!!!!!!!!!!!!!!!!!!!!!!!!
BE CAREFUL!!!!!!!!!!!!
Scientific Method Notes
2. Gather info
3. Form hypotesis/theory
4. Perform Experiment
5. Analyze data
6. Conclusion
Baking Soda Lab
1. Hole in rubber tubing
2. Stopper not on tight
3. Tubing not in top of bottle
Saftey
2. Safety equipment in room-Fire extinguisher, fire blanket, eye wash/shower
3. Chemicals-Always waft liquids to detect odor, Never waft solids/powders
4. Glass-Hot and cold glass look the same, never use chipped or broken glass, never use force to remove or insert glass
5. Alcohol Burners-Roll up sleeve, put up long hair, dont walk away from lit burner, never point open end of hot test tube at yourself or someone else, dont look down at test tube/beaker while heating
6. Diluting acid-Acid must be added to water, never add water to acid-could cause exothermic reaction, water is less dense(lighter) than acid so it will sit on top of acid and splash out
Mass and Volume lab
1. Remass same cylinder
2. Cylinder is wet when massing
3. H2O splash out
Volume Chart
Volume of Air Space-Dry sand-sand alone
% of Dry sand that is sand-Sand alone\dry sand
% of Dry sand that is Air space-air space/dry sand
Conversions
100 cm=1 meter
1 kg=1000 g
Volume by displacement of water
1. Sand sticks to side of wet cylinder-Volume of sand and water will be lower
2. Record volume of sand not level of H2O level-volume of sand and water lower
3. Pour water into sand-volume of sand and water will go up
Finding Accuracy of Balance
Ending mass-intial mass of stopper=change in mass
Mass of Dissolved Salt
1. Spilling salt between cap and bottle
2. Take salt off pan before you mass
3. Remove cap before Mf
4. Not shaking enough
5. Cap not tight-causes spilling
6. Not drying cap-starts dissolving early
7. bottle wet on outside for Mi
Most errors lead to decrease
Mass of Ice and Water
1. Shake bottle
2. Not wiping off condensation on outside
3. Not letting ice melt all the way
4. Not drying bottle and cap
5. Removing cap before Mf
Condensation forms by hot water vapor hitting the colder surface-turns into water
Mass of Copper and Sulfur
2. Hole in rubber sheet-gas escapes
3. sheet not on tight
If we used stopper, it would have blown off because sheet can stretch
Liquid comes from the sulfur
Sulfur dissolved into gas
Density of Solids
1. Find volume before you mass it-mass and density increase
2. Mass same cube twice
3. Measure same side of cube or slab
4. Measure from end of ruler instead of from the line
Density of Liquids
1. Liquid sticks to side when pouring
2. Drying out cylinder after massing
3. Cylinder contaminated
Density of a Gas
1. Hand not tight on bottle-water leaks out-V goes up D goes down
2. Spill water-V decreases D increases
3. Break tablet after Mi-M increase D increase
4. Hole in tubing, stopper falls off, take too long to put tubing in-V decrease D increase
5. Air bubble in bottle
6. Not putting foil on-M increase D increase
Density should be 1.8 because is Carbon Dioxide