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Laws of conservation of mass
1.2 conservation of mass answer key
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The results from the experiment show that the Law of the Conservation of Mass is correct in the two different experiments. The experiment in an open environment showed that the mass will always stay the same when vinegar and sodium hydroxide react with each other. The mass of each substance was calculated before the reaction, and after the reaction, the mass of the reaction was the same and no mass was lost. In the closed environment experiment that provided gas, the amount of gas complimented to the mass of the other substances and showed that no mass had been destroyed or created. These results prove the hypothesis as the mass of both substances were predetermined before the reaction and proved the mass stayed the same throughout the …show more content…
Scientists could use different amounts of each substance. Only 50 mL of each substance were used in the first experiment and to ensure that the Law of Conservation of Mass works for all kinds of amounts, the experiment could be conducted using fewer or larger amounts of the materials. This would help illustrate larger or smaller chemical reactions. Also, both of the experiments use just two substances, and to further explore mass, an experiment could be conducted using different types and numbers of substances. Water vapor and carbon dioxide could be used to produce ash, which would provide a more unique and different reaction to test the mass of substances (Reference). Different room temperatures could also be used to conduct the experiment. The first experiment used temperature to compliment the experiment, and to further test the reactions, the room temperature could be set differently to see if that changes the temperature of the vinegar or other substances. If two solids are tested when they react with each other, it would provide more evidence to support the Law of the Conservation of mass. This could be conducted between a reaction in lead nitrate and potassium iodide to test if mass stays the same through solid reactions (Learn Chemistry). The Law of Conservation Mass helps people estimate and know the mass of reactions. If chemists are hoping to cause a reaction between two substances with large masses, knowing how much mass will form into either solids, liquids, or gases, will help people know the space or strength needed to conduct reactions
Compress the safety bulb, hold it firmly against the end of the pipette. Then release the bulb and allow it to draw the liquid into the pipette.
It was learned that changing the volume of the same substance will never change the boiling point of the substance. However having two different substances with the same volume will result in two different boiling points. The purpose of this lab was to determine if changing the volume of a substance will change the boiling point. This is useful to know in real life because if someone wanted to boil water to make pasta and did not know how much water to
In this experiment, we are finding the Conservation of Energy. Energy is neither created nor destroyed. Energy is summed up into two different properties: Potential energy and Kinetic energy. The law of Energy states that:
Variables that you could change Concentration of hydrochloric acid Surface area of chips Mass of marble chips Pressure Temperature Volume of hydrochloric acid Time allowed to measure oxygen given of Volume of gas collected Varying the concentration Higher concentration will make the reaction stronger, there will be more particles in the same volume so there are a lot more collisions, making the reaction faster and increasing the chance of a successful collision, lower concentration makes a weaker reaction, there will be fewer particles so less chance of a collision. Varying the pressure A higher amount of pressure will bring particles closer together making the reaction faster as there will be more collision with the energy, a lower amount of pressure will make the particles more spread put , making the reaction slower and reducing the amount of collision and energy.
A lot of things went well in this experiment. This experiment had the same amount of pennies, chemicals, and bowls to put the chemicals in and the pennies. Another thing that went well was that all the pennies got the same amount of time in each chemical. In this experiment no problems occurred. Some experiments that were thought of doing this this experiment was; What would happen
The egg expanded and the mass of the egg increased after a day of being fully submerged into the vinegar solution. The egg originally had a mass of 60.55g with a white colored shell before being placed into the vinegar solution. When the egg was taken out of the vinegar solution a day later, the egg had a mass of 80.84g and the shell was completely dissolved. The
We’d note down the weight. Then we’d get our solutions ready. We were only given a 100% solution and a 0% solution, so we had to mix them in the right ratio to get all the solutions we needed. We decided to do 5 different types of solutions so we would have a wide range of results and it would be more accurate. We’d use 100%, 75%, 50%, 25%, 0% solutions in our experiment.
I am going to carry out an experiment to measure the change in mass of
A good example would be the experiments with the concentrations of 20% to 60% concentration results to show the change. In the 20% concentration I noticed a decrease in the percentage change in mass for the experiment the percentage was _____ while for the concentration of sucrose 60% the change was _____ we can see that the percentage change in mass is decreasing thus we can conclude that the difference of the initial from the final and as it gets greater that means the mass of the potato changed massively.
The Separation Challenge is an experiment involving the use of background knowledge of mixtures, properties of matter, and creativity in order to find a solution to separate three different substances layered on top of each other within a container. The experiment required a matter of coming up with a solid and thought out procedure to successfully separate the three substances individually within an amount of time using various lab materials and technology accessible at the time.
Chemical kinetics is a branch of chemistry that involves reaction rates and the steps that follow in. It tells you how fast a reaction can happen and the steps it takes to make complete the reaction (2). An application of chemical kinetics in everyday life is the mechanics of popcorn. The rate it pops depends on how much water is in a kernel. The more water it has the quicker the steam heats up and causes a reaction- the popping of the kernel (3). Catalysts, temperature, and concentration can cause variations in kinetics (4).
For this experiment we have to use physical methods to separate the reaction mixture from the liquid. The physical methods that were used are filtration and evaporation. Filtration is the separation of a solid from a liquid by passing the liquid through a porous material, such as filter paper. Evaporation is when you place the residue and the damp filter paper into a drying oven to draw moisture from it by heating it and leaving only the dry solid portion behind (Lab Guide pg. 33.).
3. Why are the crucible and lid heated at the beginning of the experiment before being weighed?
So what exactly is matter? Matter is anything that has mass and takes up space (blue book). The particle model, however, is different for the four types of matter. For solids, the molecules can only vibrate, but solids have a definite shape and volume. For liquids the molecules are able to slide past one another and has definite volume. Both gas and plasma don't have a definite shape or volume, but in gas the molecules can move freely and bump into each other, and in plasma the molecules have completely broken apart. These molecules are too small to see and are different for every object. So what do particles have to do with vinegar and baking soda reacting? Well acids and bases are made of elements. These elements are made of atoms which are made of molecules. So when you get down to it, the reaction between acids and bases all depend on the particles of the object.
We have no gases and solids involved, therefore it is easy to deal with solutions. Similarly, the use of a catalyst complicates things, and if used incorrectly could alter the outcome of the experiment. The theory behind this experiment is that increasing the concentration can increase the rate of the reaction by increasing the rate of molecular collisions. GRAPH I will place the reaction mixture on a paper with a black cross drawn on it. When the cross is completely obscured, the reaction will be finished.