Safety goggles must be worn 


Waste chemicals are to be disposed 

In the properly labeled waste container 

Make sure when heating a liquid that there is a 





Yell fire and alert instructor and pull fire alarm if it is a large fire and evacuate the building 



If chemicals spill on your body 

Wash your hands and arms immediately with water or go to the safety shower if the chemicals are on your body and wash your eyes at the eye wash station for 1530 minutes if chemicals are in your eyes 

The uncertainty in electronic measuring tools is 

+/ 1 in the final digit displayed 

The uncertainty of a digital thermometer is 


The uncertainty of a 20 mL cylinder is 


The uncertainty of a 400 mL beaker is 


The uncertainty of a burette is 


The uncertainty of a thermometer is 


The uncertainty of a ruler with mm is 


In addition and subtraction the amount of significant figures 

Is rounded off to have the same number of decimal places as the number of decimal places in the most uncertain data used 

In multiplication and division, the amount of significant figures is 

Rounded off to have the same number of significant figures as the number of significant figures in the measured quantity with the least number of significant figures 

If the air inlets of a Bunsen burner is opened, the flame goes from 


A solution is added to a burette by 

Holding the burette in an almost horizontal positon and allowing the liquid to run down the side of the burette while rotating the burette alone it long axis to allow the liquid to contact all parts of the inner surface of the burette 

Properties whose values depend on the amount of sample or material. Examples are mass and volume. 

Extensive physical properties 

Properties whose values are independent of the amount or size of the sample. Examples are pressure and temperature. 

Intensive physical properties 

The mass per unit volume. Two extensive variables lead to and intensive one. 


Defined for liquids and solids as the ratio of the density of a material divided by the density of water. The temperature of the water is often 4 degrees C. No units. 

Specific gravity SGx = dx/dwater 


V = a^3, a = length of a side of the cube 

The volume of a sphere is 

V = 4/3?r^3, r = radius of sphere 

The volume of a right cylinder is 

V = ?r^2h, r = radius of circular cross section, h = height of the cylinder 

To gauge the uncertainty in a volume measurement 

The possible maximum and minimum values for the quantity based on the uncertainty in the original measurements must be calculated 

The volume in a graduated cylinder is found by 

Taking the difference between the initial volume and the volume with the object 

The largest volume displacement is found by 

Subtracting the largest final volume reading (+0.1) from the smallest initial volume reading (0.1) 

The smallest volume displacement is found by 

Subtracting the smallest final volume reading (0.1) from the largest initial volume reading (+0.1) 

The largest value of the density is found by 

Dividing the largest mass (+0.1) by the smallest volume of liquid delivered (0.1) 

The smallest value of the density of the liquid is found by 

Dividing the smallest mass (0.1) by the largest volume of liquid delivered (+0.1) 


part per thousand relative error = ((dn – dave)/dave)*1000 

Dalton’s atomic theory was consistent with 

The experimental laws of definite composition and multiple proportions that gave it great credibility 


One divides the moles of each component by the number of moles of the component with the lesser or least number of moles 

The formula derived from the mole ratios. Example: 1 mole Fe and 3 moles of Br yields the formula FeBr3 


The amount of a product formed when 100% of the limiting reactant is converted to product 


The amount of a product formed during a chemical reaction 


((actual yield)/(theoretical yield))100 


What is the proper method to separate mixtures 

Using a filter flask, Buchner funnel, aspirator set up 

Substances with the ability to react with both acids and bases are 


Double sulfate salts that contain two different ionic sulfate compounds in a defined ratio. Are typically hydrated compounds containing a stoichiometric amount of water molecules. 


Compounds with molecules of water involved in their formula. Some of the water molecules in these compounds may be chemically bonded to the metal atoms by coordinate covalent bonds. 


measured – accepted/accepted (100%) Used for accuracy accepted = true or standard of comparison value smaller = greatest accuracy larger = least accurate 


Truthfulness or closeness to an accepted value, on average 


Repeatability of successive measurements 

