title: lava in a cup Question: how does salt affect how the duration of a lava lamp? Research: a lava in a cup is a decorative novelty item, invented by the british accountant Edward Craven Walker, the founder of colored wax inside a glass vessel filled with clear or translucent liquid; the way rides and falls as its density changes due to heating from an incandescent light bulb underneath the vessel. the appearance of the wax is suggestive of pahoehoe lava, hena the name. the lamp are designed in a variety of styles and colors. A classic lava lamp contains a standard incandescent bulb or halogen lamp which heats a tall glass bottle. A formula from 1968 U.S. Patent consisted of water and a transparent, translucent or opaque mix of mineral oil, paraffin water and carbon tetrachloride. the clear water and/or mineral oil can optionally be colored with transparent dyes. however, …show more content…
the relationship with the salt and time is direct. i thought the numbers would be different because the numbers went all the way up to 38.11 and that was the highest. Conclusion: No the hypothesis was not supported because the hypothesis states that if the salt affects how the duration of a lava lamp then it will last longer and it did not it went the same that 3tbs last longer. Abstract: i am doing lava in a cup and the reason i choose this is because the lava was invented in 1948, it is really cool cause it really has real lava in it. the most expensive lava lamp was sold for 15,000. people buy it because u know how little kids are scared of the dark well they buy it to put lights in there room. i should know because i have a sister and she is really scared. Journal: when i was doing my experiment the first thing i had to do was get my materials that are 1) clear drinking glass 2)¼ cup of vegetable oil
These water loss values are of use in predicting how much water Darlene might have lost per day because since she survived 15 days she must have been losing water at an extremely slow rate. Even with the absolute minimum water loss, she would not have survived past day 5.
The metal cylinder was removed from the boiling water and placed in the Styrofoam cup using tongs.
In the beginning we set out to find out if water temperature has an effect on the length of the reaction of water and Alka Seltzer. In our results we found a negative correlation in the relation of the length of the reaction and the temperature of the water. The bubbles appeared to be the same amount, but came out faster in the hotter water. The results support my hypothesis to a limit, due to a suspected error whilst timing the reaction at 48°C, as it was cut off short. Otherwise, I believe that the reaction at 48°C would have ended sooner than the 39°C
The materials my group used were three identical plastic cups, four gummy bears of the same color, one plastic spoon, one roll wax paper, one sharpie marker, one roll plastic wrap, one graduated cylinder, 25 mL super saturated salt solution, 25 mL distilled water, 25 mL 80% sugar solution, and one 12 inch ruler. The procedure my group made follows these steps.
For Coke, the buret produced the most precise answer, and for Diet Coke the graduated cylinder produced the most precise answer. To determine which piece of glassware is most accurate we need to compare the standard deviations and look to see which is closest to zero. For Coke, the standard deviation of the beaker is 0.08 g/mL, the standard deviation of the graduation cylinder is 0.048, while the standard deviation of the buret is 0.023 g/mL. From these figuresit is evident that the buret is the most precise because it has the smallest standard deviation. For Diet Coke, the standard deviation for the beaker is 0.08 g/mL, the standard deviation for the graduated cylinder is 0.056 g/mL, and the standard deviation for the buret is 0.062 g/mL. For the Diet Coke the most precise piece of glassware is the
The number calculated for the moles of water per mole of anhydrous salt were precise, having a PPT of 0 since they were both the same. There was only a 1.75% error between the 2.035 mol of water per mol of anhydrous salt and the whole number of 2 that was needed for the empirical formula. The experiment was conducted both accurately and precisely. The all of the water was removed from the hydrate in the first trial, which can be confirmed by the fact that there was no change on the scale when the crucible was massed after the first heating and after the second heating. No change in mass means that there is no water left in the hydrate that could be removed. In the second trial, however, it is evident that almost all of the water was removed, seeing as there was a small change in the mass of the crucible between the first and the second heating. This difference was minimal, only being 0.0002 g. There are no obvious experimental errors that occurred, however there could have been the error of not heating the crucible long enough to get all the water out of the hydrate. If this had happened, the difference between the mass of the crucible after the first heating and after the second heating would have been more than 0.003
of each in each test tube. (Table below showing how I am going to make
During our lab we found our mass percentages for our sample to consist of 20.5% of NH4CL, 48.5% of NaCl, and 25.6% of SiO2. Being that the actual percentages of our mixture were 20% of NH4CL, 50% of NaCl, and 30% of SiO2. After using the percent error equation that was provided to us in class we found there to be a 5.4% error which is relatively accurate.
Variables --------- During the experiments, the water will be heated using different spirit burners containing different alcohols. I will be able to change different parts of the experiment. These are the. Volume of water heated:
There is not really that much I can do to help make this experiment a
NOTE: The stirring rod was not used in the First and Second experiments, as it was not available. A substitute we used the thermometer.
in 5cm³ of water and add 4cm³ of ethanol. We had tom pour this mixture
== § Test tubes X 11 § 0.10 molar dm -3 Copper (II) Sulphate solution § distilled water § egg albumen from 3 eggs. § Syringe X 12 § colorimeter § tripod § 100ml beaker § Bunsen burner § test tube holder § safety glasses § gloves § test tube pen § test tube method = == = =