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How much methanol needed to make 10 ppm calibration gas in 100ml nitrogen?
To prepare a 10 ppm (parts per million) calibration gas in 100 mL of nitrogen, you need to calculate the amount of methanol required. Since 10 ppm means 10 mg of methanol per liter of gas, for 100 mL (0.1 L), you would need 1 mg of methanol. To achieve this, you can directly weigh out 1 mg of methanol and dilute it in the 100 mL of nitrogen.
How Does a cup full of methanol and a pool full of methanol have the same mass?
A cup full of methanol and a pool full of methanol can have the same mass if the volume of methanol in the cup is equal to the volume of methanol in the pool. Mass is a property that depends on the amount of substance, which is determined by both the volume and the density of the material. If the cup and pool contain equal volumes of methanol, they will have the same mass, regardless of their sizes. However, in practical terms, a cup and a pool typically do not contain equal volumes of methanol.
Is methanol soluble with water cyclohexane and alcohol?
Yes, methanol miscible.
How do you prepare the romanosky staining method?
The Romanowsky staining method involves preparing a staining solution, typically using a combination of eosin and methylene blue or Giemsa stain. First, a fresh stock solution is made by diluting the stain in a buffered solution, usually phosphate buffer, to achieve the desired concentration. The sample, such as blood smears or tissue sections, is then air-dried and fixed in methanol before being stained for a specific duration, usually around 15-30 minutes. Finally, the stained slides are rinsed, air-dried, and examined under a microscope.
What molecule has the highest boiling point methane chloromethane or methanol?
Methanol has the highest boiling point among methane, chloromethane, and methanol. This is because methanol has stronger intermolecular forces (hydrogen bonding) compared to methane (only dispersion forces) and chloromethane (dipole-dipole forces).
How should you prepare dried beans?
Stir fry
How do you prepare formic acid from methanol?
Formic acid can be prepared from methanol through the catalytic oxidation using a suitable catalyst such as platinum or palladium. The process involves reacting methanol with oxygen in the presence of the catalyst to yield formic acid. The reaction typically requires controlled conditions of temperature and pressure.
How do prepare 0.01M methanolic hydrochloric?
To prepare a 0.01M methanolic hydrochloric acid solution, mix the appropriate volume of concentrated hydrochloric acid with methanol to achieve the desired concentration. For example, to make 1L of 0.01M solution, dilute 8.9mL of concentrated hydrochloric acid (37%) with methanol and then dilute to the final volume with methanol. Make sure to handle concentrated hydrochloric acid with caution and wear appropriate protective equipment.
How do you prepare 0.1molar methanolic hcl?
To prepare a 0.1 molar methanolic HCl solution, you would first calculate the amount of hydrochloric acid needed to achieve a concentration of 0.1 moles in 1 liter of methanol. You would then measure out the calculated amount of hydrochloric acid and add it to the methanol in a volumetric flask. Finally, you would top up the flask with methanol to make a final volume of 1 liter and mix well.
Difference between methanol and ethanol?
Methanol is CH3OH, ethanol is CH3CH2OH. Both are alcohols, ethanol has one carbon more (or a CH2 group more) and is less polar than methanol. Also ethanol has higher boiling point than methanol.
How do you prepare dpph radical solution?
To prepare a DPPH radical solution, dissolve DPPH powder in a solvent like methanol or ethanol to a concentration of around 0.1-0.2 mM. Mix well until the solution is completely dissolved. The solution can be stored in the dark and at low temperature to protect it from light.
How much methanol needed to make 10 ppm calibration gas in 100ml nitrogen?
To prepare a 10 ppm (parts per million) calibration gas in 100 mL of nitrogen, you need to calculate the amount of methanol required. Since 10 ppm means 10 mg of methanol per liter of gas, for 100 mL (0.1 L), you would need 1 mg of methanol. To achieve this, you can directly weigh out 1 mg of methanol and dilute it in the 100 mL of nitrogen.
How do you get a 2.5 N NaOH solution in methanol?
To prepare a 2.5 N NaOH solution in methanol, you would first calculate the amount of NaOH needed based on its molar mass and the desired concentration. Then, dissolve this amount of NaOH in the appropriate volume of methanol to make the 2.5 N solution. Be sure to wear appropriate safety gear and follow proper handling procedures when working with NaOH.
How do you prepare the Karl fischer reagent?
To prepare Karl Fischer reagent, you typically need iodine, sulfur dioxide, methanol, and water. Start by dissolving iodine (I2) and sulfur dioxide (SO2) in methanol to create a solution, then add a small amount of water to the mixture. The ratio of components can vary, but a common formulation is 1 part iodine, 1 part sulfur dioxide, and 10 parts methanol, adjusting as necessary for specific applications. It's crucial to handle all chemicals with care and to work in a well-ventilated area or fume hood when preparing the reagent.
How do you prepare 30 percent of methanolic KOH solution?
To prepare a 30% methanolic KOH solution, you would mix 30g of KOH with enough methanol to make a total solution volume of 100mL. This would result in a solution where 30% of the total weight comes from KOH. Be cautious when handling KOH as it is a caustic substance and should be handled with appropriate precautions.
How do you prepare 0.002N methanolic KOH?
Molar mass KOH = 56g/mol and 0.002 N KOH = 0.002 moles/L0.002 moles/L x 56 g/mole = 0.112 g/LDissolve 0.113 grams KOH in 1 liter or methanol, or any fraction/multiple thereof. For example, dissolve 0.0113 g KOH in 100 mls or dissolve 0.226 g in 2 liters of methanol.
Is methanol an acid?
Yes, methanol is a weak acid.
