75 g of impure sodium hydroxide is added to 250 cm3 of water. 10 cm3 of this impure solution is neutralized by 13,5 cm3 of HNO3 concentration 0,2 mol.dm–3. Calculate the percentage purity of the sodium hydroxide.

Q: How many moles of Na,SO4 are in 100.0 mL of a 0.2500 M solution ? The GFW is 142.07 g. O A. 0.0500…

A: 0.25 M Na2SO4 solution. Molarity = number of moles in 1L of solution So, 0.25 moles of Na2SO4 in 1 L…

Q: Of a 10%6 SDS solution in H20. The combined final solution would be 0.5M NaC1 and 1% SDS. If you are…

A: Molality is never equal to molarity. But the difference becomes lesser as the solutions become more…

Q: The density of a substance is 3.596 g/ml and has a weight of 32g. What is the volume?

A: Volume is defined as the total space occupied by a substance. Density can be defined as the…

Q: The master formula for preparation of a ganciclovir solution is: Ganciclovir 500 mg injection vial 1…

A: Each vial contains 500 mg of ganciclovir. After 10 mL additions each of the vials gives 50 mg.

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A: Soap is the cleansing or emulsifying agent, which helps to remove dirt.

Q: If a pharmacist needs to prepare a bacterial suspension with a concentration of 2.4x10^2 cfu using 1…

A: A colony-forming unit is the number of viable or alive cells in cell suspension that have the…

Q: You record the absorbance of your unknown BSA sample at 0.276. What is the concentration in ug/mL of…

A: Standard curve can be used to determine the concentration of unknown sample by determining their…

Q: BSA mg/ml O.D. 550nm 1 0.12 2 0.23 3 0.34 4 0.41 5 0.52 Use the values above to draw a graph

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Q: 0.47 absorbance/ 4713.6 mol/L = In scientific notation please & 0.57 abosorbance/4713.6 mol/L=

A: Beer-Lambert law states a linear relationship between concentration and absorbance. When…

Q: A solution measuring pH 12 is _________ times __________ concentrated with H+ than a solution…

A: The term "pH" was first described by Danish biochemist Soren Peter Lauritz Sorensen. pH is defined…

Q: Determine the pH for the following solutions.  {H3O+}=2.4x10^-2 M

A: p in pH denotes negative of the logarithm(-log). So pH is negative logarithm of molarity of H pH…

Q: A drug has a measured diffusivity of 5*10^-6 cm^2/s^-1 at 37 degree Celsius. What is this drug’s…

A: The Stokes-Einstein equation is used to measure the viscosity of various solutions, and the…

Q: How many mL of methadone is needed for a patient who was prescribed 0.015 g of methadone? The vial…

A: The volume of drug solution (methadone) to be infused will be calculated by considering the volume…

Q: 50 mL of 5mM NaCl solution from 1 M NaCl solution

A: Dilution is the process by which we decrease the concentration of a solution. This process is vital…

Q: You have 150 g of dextrose available and you need to compound a 20% solution. If you use the entire…

A: When we describe a concentration as a percentage without specifying the type of formula, we imply…

Q: Ammonia-containing window cleaners are considered pH-neutral substances true or false?

A: As chemicals are dissolved in water, the pH level of the mixture is either acidic or basic. pH level…

Q: How many grams of NaOH would you need to make 3,982 mL of a 3 M NAOH solution (m.w. = 40.00 g/mol)?…

A: By the concept of molarity, we can determine the concentration of a solution. It is the total number…

Q: A chemist is performing a precipitation titration on a 1.00 L sample containing an unknown…

A: Titration is the process, in which the exact concentration of the unknown solution can be used to…

Q: 4. 25.0 mL of an unknown acidic solution was titrated with 42.7 mL of a 0.15 M NaOH solution. What…

A:

Q: Benzalkonium chloride 17% w/v . . . . . qs           Water qs . . . . . . . . . . . . . . . . . . .…

A: Question is related to drug calculation.  Detailed solution in step 2.

Q: How many grams of NaOH would you need to make 7,252 mL of a 230 mM NaOH solution (m.w. = 40.00…

A: Answer- Here molarity of the solution is provided and requires the amount of weight of NaoH.

Q: How many grams are in 1 mL for the following solution?   NS _________ this is the whole question

A: NS or Normal saline: It is nothing but a mixture of sodium chloride (NaCl) and water that is…

Q: A 500 mL sample of a 0.100 M formate buffer, pH 3.75, is treated with 5 mL of 1.00 M KOH. What is…

A: The buffer solution consists of an acid and a salt of the conjugate base of the acid in a solution.…

Q: How many millilitres of Morphine Sulfate 15 mg / mL should the patient get if he needs to take 60 mg…

A: According to the formula,  Required Dose = D/H ×V where, D= desired dose; H=amount on hand; V=…

Q: The pH probe/meter uses following equations: Ecell = L + 0.0592 log a1 = L - 0.0592 pH Where L =…

A: Asked : Effect on measured pH value if acid concentration is increased  HCl is an acid

Q: If the equation produces from data is y = 0.300x - 0.857 and the absorbance for the unknown is…

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: If 4.00 L of ethyl alcohol at 18.0 ⁰C is exposed to a temperature of 25.0 ⁰C, what is the resulting…

A: Initial temparature of ethyl alcohol is T₁ = 18° C = (273 +18) K = 291 K rising the temparatute to…

Q: 5. A 0.8720 g sample consisting solely of sodium bromide and potassium bromide yields 1.505 g of…

A: NaBr is sodium bromide KBr is potassium bromide  AgBr is silver bromide Molecular weight, Na=23…

Q: How many grams of sodium chloride are needed to make 0.60L of 2.3M sodium chloride solution

A: The concentration of a solution is expressed in molarity. Molarity is defined as the number of moles…

Q: 00 ml total solution, the resulting stren 5..?

A: A pharmaceutical medicine is a chemical substance that causes a biological or physiological effect…

Q: A patient is prescribed 15mmol of potassium chloride injection. The ampoule contains 20mmol in 10ml.…

A: Given data    A 10 ml ampule contains = 20 mmol

Q: A 75.0 g piece of Ag metal is heated to 80.0 C and dropped into 50.0 g of water at 23.2 ° C. The…

A: To find: Specific heat of silver

Q: 12- 10- 8- 6- 4- 2- 0- 20 40 60 80 Volume of NaOH (mL) Hd

A: The titration curve is the graphical representation of pH. The pH is greater than 7 for weak acid…

Q: To make up a solution of phosphate buffered saline (PBS), you need 10 mM Na2HPO4 (anhydrous) (FW:…

A: Convert the constituents in grams by multiplying with the respective molarity to convert grams per…

Q: If an unknown solution of cobalt (II) chloride has an absorbance of 0.79, what is its concentration?…

A: The Beer’s Law plot is a graphical representation of the relationship between the absorbance and the…

Q: Given a BSA stock solution of 4mg/mL how would you prepare a 5 mL sample with a final concentration…

A: The following formula is used to find the volume required to prepare a 5 mL sample with a final…

Q: A solution is made by mixing 56.9 g of water and 23.8 g NaCl. What is the concentration of NaCl in…

A: Given Values: Weight of the water = 56.9 grams Weight of NaCl = 23.8 grams

Q: 50 mL of 15 mg/mL NaOH solution from 100 mg/mL NaOH

A: Sodium hydroxide is an inorganic compound with the formula NaOH. It is an ionic compound consisting…

Q: A KCC student titrated 100.00 mL of a NaOH solution using 55.00 mL of a 0.1000M H2SO4 solution. How…

A: The reaction of an acid with a base is called an acid-base reaction. It is also called a…

Q: If 10g of salt was mixed in 1L water. What percent solution will this be.

A: According to the question,Mass of solute = 10 grams = 10gVolume of water = 1L = 1000 mili Liters…

Q: How could you prepare 500 mL of a 6.0 M NaOH solution using solid NaOH pellets? What is the percent…

A: Molar concentration is a measure of the concentration of a chemical species, in particular of a…

Q: given a stock solution of 10% dextrose, how would you make 5 mL of a 0.9% dextrose solution? find mL…

A: Given Values: The concentration of the stock solution of dextrose = 10% Concentration of the final…

Q: A 523.1-mg sample of impure KBr is treated with excess AgNO3 and 814.5 mg AgBr (187.774 g/mol) is…

A: Reaction between KBr and AgNO3 given as: KBr + AgNO3 --> KNO3 + AgBr

Q: How many moles of HCl are there in 75.0 mL of 0.160 M HCl?

A: Molarity can be stated as the soluble moles of solute, which is dissolved per liter of solution.

Q: What volume of 0.10NH2 SO3 will be required to neutralize a solution containing 10.0grams of…

A: Given Values: Weight of Ca(OH)2 = 10 grams The molecular weight of Ca(OH)2= 74 Normality of H2SO4 =…

Q: FREE RESIDUAL CHLORINE IS 1. Chloramide compounds 2. hypochlorous or chloric acid 3. haloform…

A: Introduction :- The quantity of chlorine that remains in the water after a given period or contact…

Q: how many grams of sr(no2)2 are needed to make 200 ml of 0.300M solution of sr(no2)2

A: Molarity is defined as the number of moles dissolved per 1000 ml of solution.

Q: Calculate the followings:  The pH of the final solution after adding 300 ml of 40 mM NaOH to 600 ml…

A: pH is the scale that is used to specify the acidity or basicity of an aqueous solution. Acidic…

Q: Calculate the molarity of dilute Ca(OH)2 solution if the titration of 30.00 mL of 0.05231 M HCl…

A: Given : 30.00 mL of 0.05231 M HCl For this , n 2=1 as 1 hydrogen ion is present V2= 30 ml M2 =…

Q: What is the pH of the following buffer mixtures?                                            (a) 100…

A: Given values: (a) Volume of acetic acid = 100 ml Concentration of acetic acid = 1 M Volume of sodium…

Q: How many liters of a 7 M NaOH stock solution would you need to make 780 mL of a 153 mM NaOH…

A: Molarity is defined as the number of moles of solute present in a liter of solution.  Molarity =…

Q: If a sukfuric acid solution is titrated with the above sodium hydroxide soultion, it reqires 45.20…

A: Acid-base titration: This is a standard procedure to measure the concentration of unknown acid/base…

Q: If skin cleaning solution is to be diluted 1 teaspoon to 64 ounces of water, how much water would…

A: GivenOne teaspoon of skin cleaning solution is diluted to 64 ounces of water.To findWater needed to…

Q: How many mL of a ½ strength magnesium sulfate solution will contain 10 grams of magnesium sulfate?

A: Drug dose is the amount of drug in mg which is needed to be administered into the patient  Strength…

Q: 950 mL of 1X CuSO₄ * 5H₂O solution from 25X CuSO₄ * 5H₂O solution

A: Given Values: Stock solution = 25 X CuSO4 . 5H2O Final Solution = 1 X CuSO4 . 5H2O Volume = 950 mL

Q: Standardization of Hydrochloric Acid Solution Answer the concentrations in 3 significant figure. The…

A: n1M1V1= n2M2V2 n1=2 for Na2CO3, n2=1 for HCl M1 is molarity of Na2CO3 V1 is volume of Na2CO3 M2 is…

Q: 5. A 0.01 M solution of HCI will not hurt your skin, yet a 0.1 M solution of HCI will leave a…

A: Hydrochloric acid is a colorless and odorless solution of hydrogen chloride and water with a…

Q: A 1–fluid ounce (29.573 mL) solution contains 4.5 grains (291.60 mg) of silver nitrate. How much…

A: Isotonicity of nasal fluid is similar to 7 % of sodium chloride, NaCl.7% of NaCl means 7 grams of…