4. 25.0 mL of an unknown acidic solution was titrated with 42.7 mL of a 0.15 M NaOH solution. What is the M of the unknown acid? Show your calculation below.
Q: Given .750L of a 12M HCI solution, what volume of 5.00M HCI could you make?
A: Dilution formula is N1V1 = N2V2. N1 = normality before dilution. V1 = volume of the solution before…
Q: What is the strength (mg/mL) of promethazine hydrochloride in the following compound? How many…
A: Promethazine hydrochloride is the first generation antihistamine. It is used to treat allergies,…
Q: 40.00 mL of 0.1100 M HCl is diluted to 100 mL with H2O and titrated with 0.1M NaOH. Calculate the pH…
A: pH is generally a method to find acid or base. The ranges from 0 to 14, with 7 being neutral. pHs of…
Q: Sodium Citrate 5 g Tartar Emetic 0.015 g Cherry Syrup ad 120 mL Using a balance with a sensitivity…
A: Correct answer is 22.5 ml Examplnation given with image in step 2
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 have a 62% dextrose solution. How many mL will give you 35 g of dextrose?
A: Carbohydrates are molecules that include carbon, hydrogen, and oxygen and have the formula (CH2O)n.…
Q: How many moles of argon are in 40.1 g of argon?
A: In this question, we have to find the number of moles of argon in 40.1 gm of argon using the formula…
Q: What is 80.1ml in liquid volume?
A: The volume of an object is defined as the 3-D (three-dimensional space) present within a closed…
Q: Calculate the pH of the following buffers containing; 2.95M HC2H3O2 and 1.5M NaC2H3O2 ka = 1.8X10 ka…
A: According to Handersen Hasselbalch equation pH can be calculated using the following formula pH= pKa…
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: If you have a sugar with a molecular weight of 315 g/mol, how many grams would you need to add to…
A: Given the molecular weight of sugar is 315g/mol. The volume of the solution is 487 mL and its…
Q: 439 mL of 0.270 M hydrochloric acid is exactly neutralized with 0.920 M potassium hydroxide…
A: Given Values: Volume of HCl = 439 ml The concentration of HCl = 0.270 M Concentration of NaOH =…
Q: Propanamide and methyl acetate have about the same molar mass, both are quite soluble in water, and…
A: Propanamide is an amide of propanoic acid with the chemical formula CH3CH2CONH2. Methyl acetate is…
Q: Benzalkonium chloride 17% w/v . . . . . qs Water qs . . . . . . . . . . . . . . . . . . .…
A: Question is related to drug calculation. Detailed solution in step 2.
Q: What is the mass in grams of 30.50 moles of KBr
A: The molar mass is defined as " It is the addition of all the atomic mass of atoms present in the…
Q: Using your calculated concentration from the graph (in mol Cu2+/L) and the concentration of the…
A:
Q: You are asked to prepare 50 ml of a 1:100 rifampin (rifadin) and you have in stock a 1:20 rifampin…
A: Rifampin (Rifadin) is an antibiotic used to treat bacterial infections like leprosy, tuberculosis…
Q: How many grams of digoxXin (LANOXIN) would be required to make 25,000 tablets each containing 250…
A: This is a word problem where first we have to find out how many micrograms do the 25,000 tablets…
Q: Determine the mass of baking soda (84 g/mol) needed to completely react with 531mL of vinegar.…
A: Acid and base react to produce salt and water. In some reactions, gas may also be released (hydrogen…
Q: 75 mL of 0.300 mol/L sodium phosphate solution is combined with 67.5 mL of 0.350 mol/L calcium…
A: Sodium phosphate is an ionic compound and so exhibits an electrovalent chemical structure. The…
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: If I have a 20ml stock solution of BSA with a BSA concentration of 0.2%. How can I make two other…
A: The concentration of the stock solution of BSA is 0.2%. Percent solution is the mass of solute…
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: If a 1.20 L of strawberry wine is 10.5% alcohol by volume, how many ml of the solution is ethanol?
A: Wine is an alcoholic beverage produced from honey, fruits like grapes, pineapple, strawberry, etc.…
Q: What is the pH of a 6.7 × 10⁻⁶ M HBr solution?
A: Hydrobromic (HBr) acid is considered a strong acid, which means it gets completely dissolved into an…
Q: The OH ] of a solution can be determined from the pOH using the equation OH"]= 10" POH
A:
Q: 1M = 1 mole/L. To determine how many grams of a substance is equal to one mole the molecular mass is…
A: C₁ = the original concentration of stock solution V1= the volume of stock solution needed to make…
Q: A 510 mL IV bag contains a 25% dextrose solution. How much of the original solution must be replaced…
A: During IV transfusion and medicine administration, the concentration of the drug in a solution must…
Q: You have a 20% stock of NaCl, a 30% stack of KHPO, 2.5 M NH CI and 10 mg/ml stock of ampicill a. How…
A: The total number of shares that are literally listed (bought and sold) throughout the business day…
Q: 2.2 Assuming that the final volume of the solution after the titration is exactly 5 mL, determine…
A: Molarity(M) = [moles of solute(n)]÷[litres of solution (v)] Atomic mass of sulpher= 32+(16×4) =96.…
Q: What is the pH of a 5.9 × 10⁻⁶ M HBr solution?
A: Hydrobromic acid, HBr is an extremely strong acid, one that ionizes completely ionizes completely…
Q: What is the pH of a solution of 100 ml of 0.01 M H3PO4 and 100 ml of 0.01 M Na3PO4?
A: A buffer is an aqueous solution containing a weak acid and its conjugate base or a weak base and its…
Q: Describe the preparation of the following solutions include all mathematic calculations and…
A: Solution is a homogeneous mixture of solute and solvent. Concentration of solution is the amount of…
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: If 0.752 moles of (NH3OH)Cl is dissolved in 1 L of water what is the pH of the solution?
A: pH is considered the scale used to determine the acidity or basicity of a solution. It is…
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: Make a standard curve by using the values given in the table and determine the concentration of…
A: Bovine serum albumin or BSA is used for standard curve preparation because of its stability. The…
Q: The density of trifluoroacetic acid vapor was determined at 118.1 °C and 468.5 torr, and found to be…
A: In a chemical reaction, equilibrium is considered the state, where the rate of the forward reaction…
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: Balance the following equation, and tell how many moles of nickel will reactwith 9.81 mol of…
A: The balanced chemical equation is a chemical equation in which both sides of equation contains equal…
Q: If 150ml of polyethylene glycol 400 weighs 74.1g, what is the specific gravity?
A: The division of density of the substance and standard density is called specific gravity. It is also…
Q: An IV of 650cc of 5% dextrose contains how many grams of 5% dextrose?
A: Dextrose is defined as a type of simple sugar molecule that has wide variety of uses such as…
Q: What is the mass in grams of 24.2 moles of NaCl?
A: Moles can be stated as amount of any substance, which is measured in grams, liters, atoms, or…
Q: Identify the acid on the left and its conjugate
A: An acid donates a proton. If it is neutral , it becomes a negatively charged conjugate base. This is…
Q: What is the pH of an aqueous solution with {H3O+} = 6x10-12
A: pH is logarithm of the reciprocal of the H+ or H3O+ ion concentration in a solution that is…
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: Ethylene glycol, the main ingredient in antifreeze, contains 38.7% carbon, 9.7% hydrogen and 51.6 %…
A: The empirical formula of a chemical compound is the simplest positive integer ratio of atoms present…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- *Test for Phosphate 1. Mix 1 mL of hydrolysate and 3 mL of NH4OH solution. 2. Add 10% HNO3 solution until acidic to litmus. 3. Add 2 mL of 0.2 M ammonium molybdate solution. 4. Warm in a boiling water bath for 2 minutes. Observe for the formation of yellow precipitate. *What is the chemical name and formula of the precipitate? _________________________________ 1. Suppose Biuret test is conducted to a solution of RNA. Will it give a positive result or not? Explain your answer. ____________________________________________________________________ ____________________________________________________________________ 2. Why is Molisch’s test used for the determination of presence of pentose in the hydrolysate? What other test could be used for this? ____________________________________________________________________ ____________________________________________________________________Question:- tube 1: 5ml milk, 10 drops phenol red, 5 ml distilled water tube 2: 5ml milk, 10 drops phenol red, 5 ml distilled water, bile salts * why are 5ml of water added to tubes 1 & 2?Part I. For each of the following four questions: calculate and describe how the requested solution would be made. Please show all of your calculations. In all cases the diluent or solvent will be water. Also, assume the smallest volume you can accurately pipette is 1ul. (CaClh: Molecular weight = 111.0 - NaCl: Molecular weight= 58.44) 1. From a 3M CaCh stock solution, you need to make 600 ml of 9 mM CaClh. Indicate how you would make it. 2. You have a 20ul sample of DNA that you want to run in a gel. You are given 5X track dye; how much track dye do you add to your sample so that the track dye concentration in the sample is 1X? 3. You need to make 6 liters of 20% NaCl solution. Indicate how you wvould make it firom powdered NACI.
- What's More Activity 2. Observing and Comparing Solids Directions: This is a short activity that can be done in approximately 10 minutes. Follow the procedures and answer the questions that follow. Materials needed: Magnifying glasses, sugar, salt, pepper >You will observe granules of sugar, salt, and pepper under a magnifying glass, and observe the similarities and differences among these common materials. >A pinch of each material should be taken from its container and placed on a piece of paper or board paper.Using different magnifying glasses with different powers, you will examine the grains. *For those who have no magnifying glass, you can look at the picture or open the link located below the picture. light muscovado demerara caster dark muscovado granulated soft brown Sugar Granules https://bit.ly/2KH7CSRSOMOGYI-NELSON Method(clinical chemistry) a. What is the type of blood sample used and how much of it is added to distilled water? b. How much distilled water was used in the procedure? c. What are the protein precipitants used and indicate the specific concentration of each? d. What is the color of the precipitate?f. What is the temperature inside the laboratory refrigerator? 8- What is the temperature inside the laboratory freezer? h. Your choice: i. Your choice: Your choice: 3 Return the materials to the designated location. Thoroughly clean your glassware, and clean and disinfect your laboratory station. Check Your Understanding- 3.1 Describe the difference between estimating the volume of a fluid in a graduated cylinder made of glass compared with one made of plastic. 3.2 Why is taring a balance important? 3.3 Liquid nitrogen is nitrogen cold enough to exist in the liquid form. It has a boiling point of -320.4°F. Convert this value to degrees Celsius.
- A.How much of 10,000x SYBR safe would you add to 50 ml to make a final concentration of 1x? B.How will you set up the serial dilution? How many tubes do you need? What is the concentration in each? How much LB will you add to each tube? What volume of cells will you add?Report Sheet: Proteins (page 3) What kind of protein is casein? Name: POST-LABORATORY QUESTIONS: What is the isoelectric point of casein? What is acid in our sour milk? How is it produced? What type of chemical grouping is present in all proteins? How many of these chemical groupings must be present in a molecule to give a positive Biuret test? Give the principle involved and the chemical structure responsible for the positive Biuret Test? Can you distinguish proteins and other amino compounds by the Ninhydrin test? Explain. 30 | Biochemistry18 Students were provided with cubes of slightly alkaline gelatine of different dimensions, containing an acid-alkali indicator that is red in alkali but yellow in acid. The cubes were placed in dilute acid solution, and the time taken for the colour in the gelatine to change from red to yellow was measured. Dimensions/mm Surface area/mm² Volume/mm³ Time/minutes 10 x 10 x 10 600.0 1000.0 12.0 5x 5 x5 150.0 125.0 4.5 4 x 4 x 4 96.0 64.0 4.2 2.5 x 2.5 x 2.5 a For each block, calculate the ratio of surface area to volume (SA:V). b Plot a graph of the time taken for the colour change (vertical or y axis) against the SA:V ratio (horizontal or x axis). c Explain why the colour changes more quickly in some blocks than others. 37.5 15.6 4.0
- Test for Phosphate? 1. Mix 1ml of hydrolysate and 3ml of NH4OH solution. 2. Add 10% HNO3 solution until acidic to litmus. 3. Add 2ml of 2.0M ammonium molybdate solution. 4. Warm in a boiling water bath for 2 minutes. Observe for the formation of yellow precipitate. What is the chemical name and formula of the precipitate?points) You have to make 50mL of 0.05M HCI from a 10M HCI stock solution, but the onlymeasuring devices available are 100mL graduated cylinders and 10mL serological pipes. Howcould you accurately make the dilute HCI solution (clearly explain)?16. Your Excel data graph for Serial Dilution lab:** 16a. Include a clear and labeled graph of DF (x axis) versus Absorbance (y axis). See box above for expectations and review video tutorial of this Excel work. Do not graph two of your data points: your blank or your Cuvette #1 (DF=1). 1 Q A Multiple Styles W S X 3 E D $ 4 To C R F % 5 I T V U ^ 6 G Y 7 H U 8 J BN S ( 9 K M X