Heat of Reaction

I. TITLE and/or RESEARCH QUESTION:

What is the enthalpy be determined when you combine magnesium and hydrochloric acid together?

II. ABSTRACT

The whole purpose of this experinent we combined Magnesium and HCL to figure out the enthalpy. After finding out all of the temperatures and masses, next up we used the SPARK and after determining calculations we found the Enthalpy was 466.75

 
III. SAFETY CONSIDERATIONS

Safety Goggles on at all times

Dont come in contact with chemicals

Arms length away

 
IV. MATERIALS: 

Calorimeter

SPARK

HCl

Magnesium

Graduated Cylindar

 
V. PROCEDURE:

Weigh Calorimeter

Weigh HCL in Calorimeter

Weigh .2g of Mg ribbon

Find the starting temp. of the HCl

Place Mg in HCl.

Place the SPARK probe in the calorimeter

Record temperature every 15 seconds.

When reaction is complete, record the final temperature..

VI. EVIDENCE COLLECTED:

 
VII. CLAIM: 

The enthalpy of magnesium and hydrochloric acid combined is -466.75. 

VIII. SCIENTIFIC EXPLANATION

 When combining magnesium and hydrochloic acid the enthalpy equaled about -466.75. This was determined by balancing the equation, determining the temperature change, converting it to kilojoules, changing the grams to moles. This means that -466 is the amount of change in energy during a reaction. Because the number was negative, it indicates that the system lost heat as the surroundings warmed up.

FEEDBACK

THE GOOD

They liked my cover picture and thought my bibliography was very sufficiently thorough...and i have a good start.

THE BAD

take more care while using "it" and make sure people know what im talking about. i interchanged biochar and terra preta but actually biochar is the charcoal and terra preta is the ameded biochar. be specific on zero waste solution

stong/weak acids and bases

RESEARCH QUESTION: 

How are concentration and pH correlated in strong vs. weak acids and bases?

ABSTRACT:

We conducted this experminet to find how the concentration and pH correlates with strong/ weak acids and bases. the problem was we didnt know how different strong acids were from weak acids or strong bases from weak bases. We used titration to find out our answers which we put into a table. We found out that as the concentrtion increases that the concentration of hydrigen atoms increased faster in HCL than the weak acid.

SAFETY CONSIDERATIONS

safety glasses

gloves

MATERIALS

HCL

kOH

Microfuse tubes

calculator

Procedure

Evidence Collected

Beer's Law of Valedation...or something like that

RESEARCH PROBLEM: Verify Beers law by determining the concentration of the unknown copper sulfate solution.

ABSTRACT: We did performed this experiment to verify beer's law. The problem at hand was how can we determine the concentration without solving mathematically. To solve the problem we used the SPARK Colorimeter. We found out that the more Copper Sulfate you add..the more red abosrbance you will have in the end..

SAFETY CONSIDERATIONS: Safety Glasses!!

MATERIALS:

SARK Colorimeter

notebook paper

test tubes

PROCEDURE:

EVIDENCE COLLECTED:

Tubes     con. of sol.     Vol. of stock sol.     Vol. of Water     Con of final sol.     Vol of Final  sol.

1            .5m                2ml                        5                            .142                 7ml

2            .5m                3ml                         4                           .214                  7ml

3            .5m                4ml                          3                          ..285                7ml

4             .5m               5ml                         2                          ..357                7ml

5             .5m               6ml                          1                           .428                7ml

6           ------                0ml                           0                         .0                      7ml

RedABSORBANCE

0

.478

.729

1.119

1.5

2.102

0

CLAIM: the more Copper Sulfate you add..the more red abosrbance you will have in the end..

Scientific Explanation:

We learned that the more copper sulfate we add to the concentrtion...the more red absorbance there will be in the end. This is because as the experiment went one there was less and less water, making the concentration of solution ger biggerwhich adds to the amount of red absorbance in the end.

Serial Dilution

Research Questions: how will the transmittance of light differ with different solutions of water and liquid bluing mix.

ABSTRACT: We performed this experiment to familiarize us with using the pascoSPARK system, as well as how to deal with making a standard serial dilution The problem at hand is determining if we can use the colorimeter to determine concentration a solution. To solve this we mixed liquid bluing solution and distilled water and measured the amount of light that passes through. We found that the stronger the solution, the less light passes through.

SAFETY CONSIDERATIONS: For safety we wore saftey glasses at all times.

MATERIALS: Liquid Bluing, Dilution Well Plate, Plastic dropper, Distilled water, 10-glass test tubes, pasco SPARK with colorimeter, and Glass cuvettes

PROCEDURE: 1. Label test tubes 1-10, 2. place 5ml of liquid bluingin test tube #1. This ia a 100% solution and can be referred to as 1x. 3. Take 12 drops from test tube #1 to test tube #2. using a clean dropper add 4.5ml to the 12 drops of original solution. 4. Test tube #2 should now have .5ml of 1X and 4.5ml of distilled water. This was our .01X solution. 5. Repeat dilution process until you can barely see the dye..

EVIDENCE COLLECTED: in the first trial with the concentration 1X we got a 0% transmittance. Second trial with a concentration of .1X we got the same results. When the concentration was .01X the transmittance was 8%. The fourth trials concentration was .001X with a 49.2%transmittance. The fifth trial was a concentration of .0001 with a transmittance 94.8%. The final trial we had a concentration of .00001 we had a transmittance of 100%

 CLAIM: The stronger the solution, the less light will pass through.

SCIENTIFIC EXPLANATION: We learned that it took 6 test tubes before you could no longer see the dye. it had 100% transmittance.. We thought the stronger th solutionthe less light would pass. we wereright because in the beginning zero light was getting through but by the end all the light was shining through,

Density Lab

Density Lab