Seventh grade biological carbon dioxide photosynthesis experiment
The following is an experiment in seventh grade biology to verify that carbon dioxide is the raw material for photosynthesis: ** 1. Experimental Materials and Tools ** 1. [Plant Material: Geraniums (You can also choose other suitable green plants)] 2. ** Reagents **: Alkaline solution, clean water, and iodine-based solution. 3. ** Other appliances **: transparent glass bell jar (or other sealable transparent containers), small beakers, large beakers, etc. ** 2. Experimental Steps ** 1. ** Dark processing ** - He chose two geraniums that grew in similar conditions and placed them in the dark for a day. The purpose was to transport or consume the original starch in the geraniums leaves to avoid the interference of the original starch on the experimental results. 2. ** Setting up Control Experiment ** - He placed the geraniums in two transparent glass jars. A small beaker filled with a solution of soda was placed in one glass bell jar, and a small beaker filled with an equal amount of clear water was placed in the other glass bell jar. Here, device 1 (with a solution of soda ash) would absorb carbon dioxide. Device 2 (with clean water) could be used as a reference to ensure that other than the variable of carbon dioxide, the other conditions were the same. 3. ** Sunlight shines ** - The two devices were placed under the sun for a period of time to allow the plants to photosynthesize. 4. ** Alcohol Decolorization ** - He prepared a large beaker to be filled with water and a small beaker to be filled with alcohol. He placed the illuminated leaves into the alcohol in the small beaker, and then placed the small beaker into the large beaker to heat it up. The effect of the alcohol was to dissolve the leave's fluorescence, which would make it easier to observe the color change later. During the process of heating, the color of the alcohol would gradually turn green as the photosynthesis dissolved, and the color of the leaves would turn from green to yellow-white. 5. ** Wash with water ** - He rinsed the leaves with water to wash away the alcohol on the leaves. 6. ** Drop in the solution ** - The rinsed leaves were dripped with an iodine-based solution. The purpose of adding the solution was to check if there was starch in the leaves. 7. ** Once again rinse with water ** - He rinsed the leaves with water again to observe the color change more clearly. ** 3. Experimental phenomena and conclusions ** 1. ** Phenomenon ** - The leaves in Device 1 (with a solution of soda and no carbon dioxide) did not turn blue, while the leaves in Device 2 (with water and carbon dioxide) turned blue. 2. ** conclusion ** - The starch was the product of photosynthesis, and carbon dioxide was the raw material of photosynthesis. Other experiments could also be used to verify that carbon dioxide was a raw material for photosynthesis. For example, similar devices could be made in two glass tanks. One tank was used to remove carbon dioxide with a solution of soda, and the other tank was filled with normal air. After dark treatment, illumination, and testing for starch, the same conclusion could be reached. In addition, the experiment using hornworts and BTL solution could also indirectly prove that carbon dioxide was a raw material for photosynthesis. Put hornworts into test tubes A and B, and add an equal amount of yellow-green BTL solution (which will change color after blowing with carbon dioxide) and plug it. Test tube A is placed under the sun, and test tube B is wrapped in black paper and placed in a dark place. After a period of time, the solution in test tube A will turn blue (carbon dioxide is absorbed by photosynthesis), and the solution in test tube B will still be yellow-green. Read more exciting novels for free
The equation of carbon dioxide formed by the reaction of carbon dioxide and water
The reaction between the soda ash and water would not directly produce carbon dioxide. The reaction between the water and the carbon dioxide was a reaction of water and carbon dioxide. The first stage of the reaction was: Na2CO3 (carbon dioxide)+H2O (water)= NaHCO3 (carbon dioxide)+ NaOx; the second stage of the reaction was: NaHCO3 (carbon dioxide)+H2O (water)= H2CO3 (carbon dioxide)+ NaOx. The reaction was irreversible. The reaction between the two would produce carbon dioxide, and the chemical equation was: Na2CO3 + 2HQ == 2NaCl2 + H2O + CO2. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to write the equation for the reaction of carbon dioxide and carbon dioxide
The chemical equation of the reaction between carbon dioxide and carbon dioxide is Na Chi CO2 + CO2 + H2 O = 2NaHCO2. When this reaction occurs in a saturated solution of Na2CO3, because the dissolution of Na2CO3 is less than that of Na2CO3, Na2CO3 crystals will be separated out. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2. Reaction of carbon dioxide and sulfur dioxide
The reaction between Na Chi O and carbon dioxide (CO Chi) produces Na Chi CO2. The reaction equation is Na Chi O + CO Chi = Na Chi CO2. This reaction is a chemical reaction, and there are no obvious experimental phenomena during the reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to write the experimental report on the reaction of carbon dioxide and carbon dioxide
Why can carbon dioxide and carbon react to form carbon?
The reaction between carbon dioxide and carbon dioxide produces carbon dioxide, and the reaction equation is C+ CO2, high temperature 2CO. This reaction was an thermal reaction, both a chemical reaction and an oxido-reduction reaction. In this reaction, CO2 was the oxidiser and C was the reducing agent. The reaction needed to be carried out at a high temperature (above 1000 degrees Celsius), in an environment with excessive carbon and lack of oxygen. For example, this reaction would occur during smelting steel. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Electrochemistry reaction in carbon dioxide
Electrochemical carbon dioxide reduction reaction (CO2CPR) was a method to convert carbon dioxide into other useful substances. Judging from the reaction conditions, the reaction conditions were mild and could convert or store regenerative electricity. The reaction could be carried out at room temperature. Electricity could be obtained from wind generators or solar cells, and the reaction could be used to convert carbon dioxide into liquid fuel or chemicals. However, to achieve this goal, an efficient catalyst must be used to convert carbon dioxide into carbon dioxide. In terms of factors affecting the reaction, the composition of the bath (especially the pH value and the positive ions) had a great impact on the reaction. In most studies, the activity trend of the alkali-metal used on different batteries was Cs>K>Na>Li. The partial desolvation of metal ions had a stabilizing effect on the absorption, activation, and intermediate formation of CO2. If there were no metal ions in the solution, CO2 would not be reduced. In terms of specific research results, different research teams had different discoveries. For example, the new molecular co-catalyst developed by researchers at the University of Twente in collaboration with Shell could greatly reduce the energy requirements of the reaction. By simultaneously transferring the electrons and neutrons to the carbon dioxide molecules, it could achieve 100% conversion efficiency. The research team of Associate Professor Xiao Hai of Tsinghua University found that the reaction dynamics of the electron transfer (ET) elementary step activated by CO2 on the surface of copper (Copper) metal had a similar "reversal zone" predicted by Marcus theory. In terms of catalyst research, for example, oxide-derived copper catalyst had the most potential for the rapid and efficient reduction of carbon dioxide to ethene. However, due to the self-evolution of the nano-structure and the reduction of high-priced copper species, the copper/copper hetero-interface with catalyst activity would disappear and the performance would drop sharply. The construction of oxide-derived copper catalyst with stable nano-structure and copper/copper hetero-interface was of great significance for improving the stability of C2H4 from CO2HR. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of carbon dioxide and methane
The chemical equation for the reaction between methane and carbon dioxide was CH + CO Ü = 2CO +2H Ü; there was also a thermal chemical equation for the reaction between methane and carbon dioxide, CH + H Ü O = CO +3H Ü. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Supercritical carbon dioxide reactor
The following are some general procedures related to the operation of the carbon dioxide super-critical reactor: 1. ** Material preparation **: - For example, when extracting the Distraction Wood essential oil, the dried walnut bun must first be broken to 40 mesh. 2. ** Filled into the reaction kettle **: - He placed the prepared materials into the super-critical reaction kettle. 3. ** Setting parameters **: - In a reaction kettle with circulating oil bath heating and temperature control, if the design temperature is 100 ° C, the temperature parameters should be set well when using a reaction kettle with a temperature of 50 - 70 ° C, and the temperature control accuracy should be +/-1 ° C when there is no heat absorption and release. As for the stirring speed, such as 1000rpm. Max, it should also be set accordingly. - The temperature and pressure module in the test system for high-temperature corrosion of super-critical carbon dioxide had to set the temperature and pressure to meet the reaction conditions. - When extracting the essential oil of camelia, one had to control the pressure and temperature in the excavator. The higher the pressure and temperature, the higher the quality and yield of the essential oil. However, too high a temperature would destroy the active ingredients in the flowers, so it had to be controlled appropriately. 4. ** Inject carbon dioxide **: - Inject carbon dioxide to the set temperature. 5. ** Reaction process **: - For example, when extracting the Distraction Wood essential oil, the extraction time was 120 minutes. 6. ** Material discharge **: - After the reaction, open the discharge valve and discharge the materials in the reaction kettle into the buffer tank (the air outlet of the buffer tank can be installed with a 0.5-mum filter). Different application scenarios may have different operational requirements for the carbon dioxide super-critical reactor. For example, in the test system for high-temperature corrosion of super-critical carbon dioxide, the air source module, the mixing and buffer module, the heating and pressurizing module, and the corrosion reaction module were required to cooperate. The corrosion reaction module also included special settings such as dynamic high-temperature and high-pressure reactors and static high-temperature and high-pressure reactors. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is the product only the reaction of iron dioxide and carbon dioxide?
There was no reaction between FeO and carbon dioxide, so there was no such reaction. Because the iron dioxide was an alkali-based compound, there was usually no such simple reaction to produce iron dioxide and carbon dioxide. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction conditions of sulfur dioxide and carbon dioxide ions with water
Sulfur dioxide ($SO2 $) will react with water to form sulfurous acid ($H2SO3 $). Sulfurous acid is a dibasic acid, which is more acidic than carbolic acid. There is a equilibrium of the decomposition of carbonate-ions ($CO3 ^{2 - }$) in water. When sulfur dioxide, carbon dioxide ions, and water react: Judging from the properties of the acidic oxygen, the reaction could be carried out step by step. Firstly, the reaction of SO2 with water produces sulfurous acid. The chemical equation is: SO2 + H2O> Sulfuric acid then reacted with the carbonate-based ion. Sulfuric acid was then gradually dissociated to produce hydrogen ions ($H^+$), which reacted with the carbonate-based ion. If the amount of sulfurous acid is small, the ion equation of the reaction is $2SO2 + 2CO3 ^{2 - }+ H2O = 2HSO3 ^ - +2HCO3 ^ -$; if the amount of sulfurous acid is excessive, the ion equation of the reaction is $SO2 + CO3 ^{2- }+ H2O = SO3 ^{2 - }+ 2H^ + + CO2 ^$. The hydrogen ions produced here further react with the carbon dioxide ions to form carbon dioxide and water. The reaction conditions were normal temperature and normal pressure, and no special reaction conditions such as heating and catalyst were needed. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>