The question I was trying to answer is Which balanced chemical equation best represents the thermal decomposition of sodium bicarbonate. Using that question to guide us we were trying to determine which of the four chemical equations show how atoms are rearranged during thermal decomposition. We concluded it was the second chemical equation, we know that because: During our investigation we first decided how much sodium bicarbonate we would be using. We decided on 11 grams which was about half of the crucible. We then used the bunsen burner to heat up the sodium bicarbonate. We heated the sodium bicarbonate expecting there to would be a chemical reaction and the atoms would be rearranged during thermal decomposition. We heated the sodium
bicarbonate 3 times. The reason for that is we wanted to heat it until there was no change in the mass. After each time it was done heating we allowed the crucible to cool then weighed it. We subtracted the weight of the empty crucible with the lid from the total weight of the crucible with the product so we would get the mass of just the sodium bicarbonate. The mass stopped changing at 6.9 grams. We then did our calculations, when we first did our calculations we used actual and theoretical yield and conversion factors but then when we were given time to discuss with our group we came up with another way that got us the same answer using cross multiplication. We know the second equation 2NaHCO3(s) → Na2CO3(s)+CO2(g)+H2O(g) is correct because we compared the stoichiometry calculations of the amount(mass) of NaHCO3 that was left after heated and the second equation best matched our answer.
For example, a balanced chemical equation of a certain reaction specifies that an equal number of moles of two substances A and B is required. If there are more moles of B than of A, then A is the limiting reactant because it is completely consumed when the reaction stops and there is an excess of B left over. Increasing the amount of A until there are more moles of A than of B, however, will cause B to become the limiting reactant because the complete consumption of B, not A, forces the reaction to cease. Purpose
A condenser and heat reflux was used to prevent reagents from escaping. Then the solid product was vacuum filtered. The product was recrystallized to purify it and the unknown
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
2. The crucible and cover were placed on the triangle, and they were heated until they turned red hot. Afterwards, they were removed from the fire with the tongs and placed on the wire gauze to cool for ten minutes. Then, the mass of the crucible and cover was measured and recorded in the data
Experimental: The experimental procedure outlined in the OU Physical Chemistry Laboratory Manual was followed without any deviations.
The crucible and lid are heated at the beginning of the experiment before being weighed so that any moisture in the crucible is burned away.
Baking soda is a white crystalline powder better known to chemists as sodium bicarbonate. Bicarbonate of soda sodium hydrogen carbonate. The native chemical and physical properties of “baking soda” account for its wide range of applications cleaning deodorizing, buffering, and fire extinguishing. Baking soda can neutralize chemical smells and all types of other smells.
By this I mean that we will set up the apparatus in a way that would give us a large temperature rise in a short amount of time, e.g. 2 or 3 minutes. Then the s Here is a diagram of how we set up the apparatus. To perform this experiment we needed. * Electric weighing scales * A measuring cylinder 5 spirit burners (1 for each fuel). * A copper calorimeter with a lid *
The Enthalpy Values for the Reaction Between Calcium Carbonate and Calcium Oxide with Hydrogen Chloride
In this experiment, we will look at the concentration of sodium bicarbonate in the light reaction of photosynthesis. This will be carried out using three different colored filters to identify the effect on the light reaction of photosynthesis. Since, photosynthesis is the process whereby light energy is captured by plant, algal, or bacterial cells and is used to synthesize organic molecules from carbon dioxide and water. Although, photosynthesis is atmospheric carbon dioxide is removed and transformed into oxygen and carbohydrates. Elodea is an aquatic plant of a genus that includes the ornamental waterweeds. Sodium bicarbonate is commonly known as baking soda. On the other hand, there are four primary photosynthetic pigments found in the chloroplast
The Enthalpy Change of the Thermal Decomposition of Calcium Carbonate. Results: The 'St For CaCO3: T1 = 17. T 2 = 19 DT = 02 using 2.57g of CaCO3. For CaO: T1 = 18.
And the symbol equation for it is:. Na2S2O3 + 2HCl, S + SO2 + 2Na + H2O. Before conducting my experiment, I will research into, amongst other things, the factors that affect the rate of a reaction. This is so that I may have enough information to understand the effect of temperature on the rate of a reaction and also gain appropriate understanding to make a suitable prediction as to what the outcome of my experiment will be. Reactions occur when the particles of reactants collide together continuously.
After the some time, we filter it through a Büchner funnel before it is recrystallized and filtered again. The mass was recorded as it was dry. By adding sodium carbonate, we will now test whether what obtained is benzoic acid or not, because one can observe bobbles if it is an acid. After that we burn it to test if it is aromatic.
It's impressive. That. One. Last. Molecule. And everything as it was will seize and transform. Precision amongst what seems to be chaos, something new is born from that calculated dance. I've often had to covertly wipe the tears from my eyes as I sit, surrounded by my seemingly unmoved peers (academy awards should be handed out if I misjudged even the smallest nuance of tension in their foreheads and strain in their eyes as anything other than confusion), listening to a lecture about how this is more reactive than that, how this repels or attracts that, how bonds are formed, broken, their strength, and how usually heat, hot hot heat activates transformation and gives birth to something different, old things made anew, and how cooling down, by removing heat can suspend a process, and sometimes you can control what the outcome is, other times you have to dispose of it all, placing the waste in the proper receptacle using the appropriate means bc haphazardly submerging it under water in the sink will only cause more problems involving words like purge and evacuate. I often wonder if anyone would understand if I followed through with the compulsion to shout, "Preach!" (lol) as my professor droned on. Sometimes I think abt bringing these things up among my peers (secretly, with hopes that I can meet my future
Www2.estrellamountain.edu, (2014). CHEMISTRY I: ATOMS AND MOLECULES. [online] Available at: http://www2.estrellamountain.edu/faculty/farabee/biobk/biobookchem1.html [Accessed 20 May. 2014].