Research Question

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

Abstract

magnesium and hydrochloric acid were combined to figure out the enthalpy. After measring the temperatures and masses, we proceeded along with the SPARK. After the calculations, our results showed us that the enthalpy was 387.22.

Safety Considerations

-Safety Goggles at all times

-Do not come in contact with chemicals

-Arms length away

Materials

-Calorimeter

-SPARK

-HCl

-Magnesium

-Graduated Cylindar

Procedure

1. Weigh Calorimeter

2. Weigh HCL in Calorimeter

3. Weigh .2g of Mg ribbon

4. Find the starting temp. of the HCl

5. Place Mg in HCl.

6. Place the SPARK probe in the calorimeter

7.Record temperature every 15 seconds.

8. When reaction is complete, record the final temperature.

Evidence Collected

2HC l---> MgCl2 + H2

Q = 49.27 x 15.4 x 4.2

Q= 3,186. 78 J

3186.78 J = 3.19 kJ

.2g = .008 moles

3.19 kJ / .008g = 387.22

Triange H degrees = 801.15 - 2(-167.2)

Triangle H degrees = -466.75

(387.22 + 466.75 / 466.75 ) x 100 = -17% error

Claim

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

Scientfic Explanation

 When we combined 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, diving the kJ by the number of moles, and then determining the heat summation.

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.

In general my feedback was constructive criticism. It gave me a lot of ideas to help make my paper more informational and professional.

I'll first change the layout of my opening to add more effective information on my topic from the beginning. I can also combine some information in my smaller paragraphs with other paragraphs where it fits in. I can condense some of my sentences with the suggestions I was given and I should take Wikipedia out of my citations.

How will the transmittance of light differ with different solutions of water and liquid bluing mixed?

We conducted this experiment to see different measurements  of concentrations of solution using colorimetry. To find out the answer, we put liquid bluing in water and meausured the amount of light that passed through. We found out that the stronger the solution, the less light travels through. 

When entering the lab, we made sure to have on safety goggles and not any water bottles.

In this lab we used

• liquid bluing solution
• dilution well plate
• plastic dropper
• distilled water
• 4 glass test tubes
• Pasco SPARK with colorimeter
• glass cuvettes

First we labeled our test tubes with #'s 1-4. The first test tube had 5ml of liquid bluing solution (labeled 1X) This was our 100% solution. We then put .5mL of 100% solution from test tube #1 into test tube #2 and added 4.5 mL of distilled water to that test tube. We repeted this step for the next four test tubes which made a weaker and weaker solution each time. 

Test tube #1 with 100% solution, labeled 1X, had 0% transmittance. 

Test tube #2 at .1% also had 0% transmittance.

Test tube #3 at .01% had .8% transmittance. 

Test tube #4 at .001% had 49.1% transmittance.

The weaker the solution of water and liquid bluing (more water, less liquid bluing), the more light will be transmitted through.

The standard model has become an important tool for scientists because it will lead them to figure out the earliest seconds of the universe and explain the nature of matter and energy by describing the parts of the subatomic world & their interactions.

Positively charged protons and neutrally charged neutrons (almost equal in mass and 2,000 times greater in mass than negatively charged electrons) are located in the nucleus of an atom. Protons and neutrons are made up or quarks that are held together by zero-mass particles called gluons. Quarks DO have mass and each of the 6 quarks (up, down, top, bottom, strange, and charmed) have an anti-quark that, when they meet, destroy one another. It is this knowledge that will help scientists understand how the universe started, when there were slightly more quarks than anti quarks.

Knowing this, the string theory, where scientists are trying to create a connection between all parts of the standard model and then some, (EX: Discoveries about the universe such as black holes, dark energy, dark matter, teleportation, worm holes, virtual particles.) This theory may be achievable in my lifetime because of the greater understanding scientist are getting about atoms.

Research Question:  Where will the objects fall in the liquid?

Abstract:

We did this experiment to learn about density. It gives us background on why some objects float in some liquids, and why some don't. We used the density formula to find our answer.

Safety Considerations:

HAVE FUN :)

Materials:

• graduated cylinder
• scale
• water
• cork
• brass
• steel
• wax
• acrylic
• zinc
• polyethore

Procedure:

• weighed objects on scale
• collected the volume of the objects in a graduated cylinder using water displacement
• used the density formula (Density=Mass/Volume) to figure the density

Evidence Collected:

• cork 1.35g *v= 12mL **d= 0.11g/mL
• brass 34.30g v=4mL d=8.58 g/mL
• steel 31.43g v=4mL  d=7.86g/mL
• wax 22.30 g v=9mL d=2.47g/mL
• polyethore 0.04g v=3mL d= 1.33g/mL
• zinc 6.58g v=1mL d= 6.58g/mL
• acrylic 4.80g v=4mL d= 1.2g/mL

*v = volume **d = density

Claim:

Scientific Explanation:

 If the density of the object is higher than the density of the liquid then it is higher than the displaced volume so it will sink.The density of the objects will help determine if they will float or not in each seperate level of liquid.