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Difference between 99.9 percent ethanol and 95 percent ethanol?
One has 4.5 percent more alcohol which is important because you can get to a max of 95 percent using fractional distillation. To get the 99.9 percent or absolute alcohol, you need to use other more advanced methods. Some of these include include desiccation using adsorbents.
Is the percent of ocean on earth 70 percent or 75 percent?
70%
What is the percent of 49 out of 70?
49/70 x 100 = 70 percent.
What is 27 percent of 70?
27 percent of 70 = 18.927% of 70= 27% * 70= 0.27 * 70= 18.9
What is 2 percent of 70?
2 percent of 70 =1.42% of 70= 2% * 70= 0.02 * 70= 1.4
Is 70 percent ethanol the same with 70 percent ethanol?
Absolutely, recent painstaking scientific research has showed that 70% ethanol is the same as 70% ethanol.
Why 70 percent ethanol is used for sterilization instead of 100 percent?
70 percent ethanol is more effective at killing microbes than 100 percent ethanol. This is because the addition of water helps to denature proteins and disrupt cell membranes in the microbes, leading to better penetration and more efficient sterilization. Additionally, 70 percent ethanol is less volatile and evaporates more slowly, allowing for longer contact time with the microbes.
Why do you use 70 percent alcohol and not 90 percent while microbial culture?
Ethanol creates pores in the cell membrane of the microbial cell by solubilizing the lipoproteins of the membrane. The activity of ethanol determines its concentration. If we 90 percent ethanol, the amount of ethanol molecules available to act upon the cell is more and it attacks the cell membrane from all sides. The dissolved lipoprotein forms a kind of layer around the cell, due to which the alcohol is unable to act further and cause damage to the cell. However, if we use 70 percent ethanol, the amount of ethanol molecules are few and it is not able to attack the cell from all sides. Thus, pores are created intermittently in the plasma membrane, the ethanol penetrates the cell and damages it completely. So, 70 percent ethanol is preferable to 90 percent when using microbial cultures.
Why 70 percent percent ethanol used in labs?
70% is the most effective concentration to denature poteins so killing bacteria. At 95% the ethanol just evaporates and leaves the protein untouched. Below 70% does not denature proteins. It also makes the ethanol less flammable.
How does one prepare 500ml of 70 percent ethanol?
150 ml ethanol to 350 ml distilled water
Why you use 70 percent ethanol in laminar air flow chamber?
70% ethanol is commonly used in laminar air flow chambers because it effectively disinfects surfaces by killing a broad spectrum of pathogens, including bacteria and viruses. The 70% concentration is more effective at penetrating the cell wall of microorganisms compared to higher concentrations of ethanol. Additionally, the lower ethanol concentration helps reduce evaporation, ensuring longer contact time with the surfaces being disinfected.
What is the total volume of 70 percent ethanol from 1600ml ethanol?
To find the total volume of 70% ethanol, you need to divide the volume of pure ethanol (1600 ml) by the concentration of ethanol (0.70). This gives you a total volume of approximately 2285.71 ml of 70% ethanol.
Why is 70 percent ethanol used in rna extraction?
Seventy percent ethanol is commonly used in RNA extraction to wash and remove salts and contaminants from the RNA sample. It helps to purify the RNA by precipitating it out of the solution while leaving behind impurities. Additionally, the 70% ethanol concentration helps minimize RNA degradation during the extraction process.
How do you dilute from ethanol 96 percent to 70 percent?
Oh, dude, it's like making a weak cocktail. For every 1 part of 96% ethanol, you add about 1.29 parts of water to get it down to 70%. So, if you have like 100 ml of 96% ethanol, you mix in around 29 ml of water. Just don't mix it up with your actual drink, unless you want a real party in your stomach!
Is 70 percent ethanol is an effective disinfectant for prions?
No, 70 percent ethanol is not effective in disinfecting prions. Prions are highly resistant to common disinfection methods, including alcohol-based solutions. Specialized procedures involving harsh chemicals or autoclaving at high temperatures are required to effectively deactivate prions.
Why 70 percenet is used instead of 100 percent as disinfectant?
Disinfectants are usually mostly alcohol, Ethanol to be exact. Ethanol can only reach a purity degree of 95-96 percent in liquid form, with purer solutions existing only as a gas. 70 percent alcohol is sufficient to kill the bacteria, and a higher purity would not have any beneficial effect.
What volume of ethanol 96 percent should be added to 500 ml of 70 percent ethanol such that when the mix is made to 2.5l with water the final conc of ethanol is 55 percent?
Let x be the volume of 96% ethanol added. Initial ethanol in 500 ml of 70% ethanol = 0.7(500 ml) = 350 ml Final volume of ethanol in 2.5 L of 55% ethanol = 0.55(2500 ml) = 1375 ml 350 ml + 0.96x = 1375 ml Solving for x, we get x = 1125 ml of 96% ethanol to be added.
