A 100.0 −mL buffer solution is 0.105 M in NH3 and 0.135 M in NH4Br.

A. What mass of HCl could this buffer neutralize before the pH fell below 9.00

B. If the same volume of the buffer were 0.265 M in NH3 and 0.390 M in NH4Br, what mass of HCl could be handled before the pH fell below 9.00?

I know for A i have tried .19g, .0915, and .5`3 using three different methods. I have no idea what to do now.

Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. If 0.0735g of water is produced from the reaction of 1.6g of hydrobromic acid and 0.51g of sodium hydroxide, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it.

1)how many moles of Al are in 1mole of KAI(SO4)2 ---->12H20?

2)what is the molar mass of potassium aluminum sulfate dodecahydrate?

3)if you have 1.20g of Al, how many grams of potassium aluminum sulfate dodecahydrate should you expect to produce if you have no other limiting reactants?

4)using your data from question #4 if you actually produce 6.6g of potassium aluminum sulfate dodecahydrate what is your percentage yield?

5)based on your results from question #4 if your percentage yield was 112% what mass of potassium aluminum sulfate dodecahydrate would you recover?

The boiling point constant for water is 0.51 Kkg/mol. Calculate boiling point of water in a solution gf 0.010 mol/kg of sugar and a solution of 0.010 mol/kg of NaCl.

For the following reaction, 24.5 grams of diphosphorus pentoxide are allowed to react with 13.3 grams of water.

diphosphorus pentoxide (s) + water (l) -> phosphoric acid (aq)

what is the maximum mass of phosphoric acid that can be formed? _____ grams

what is the formula for the limiting reagent? ________________

what mass of the excess reagent remains after the reaction is complete? _______ grams

A mixture of hydrocarbons (10mol% methane, 20 mol% ethane, 30mol% propane, 15mol% isobutane, 20 mol% n-butane, 5 mol% n-pentane) is flashed into a separator at 80 F and 150 psia. What fraction leaves the separator as liquid and what is its composition?

A mixture of 1.397 g of H2 and 70.76 g of Br2 is heated in a 2.00 L vessel at 700. K. These substances react according to H2(g) + Br2(g) ↔ 2 HBr(g). At equilibrium the vessel is found to contain 0.592 g of H2. (a) Calculate the equilibrium concentrations of H2, Br2, and HBr. (b) Calculate Kc.

What is the Lock signal? What nuclei generate the Lock signal?

Which UV light hits earth's surface at the greatest intensity?

Use Charles's law to complete the table. (Assume pressure and number of moles of gas to be constant.)

A&B Express the volume in liters to three significant figures.

C&D Express the temperature in degrees Celsius to three significant figures.

In acidic solution, the sulfate ion can be used to react with a number of metal ions. One such reaction is

SO42−(aq)+Sn2+(aq)→H2SO3(aq)+Sn4+(aq)

Since this reaction takes place in acidic solution, H2O(l) and H+(aq) will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation:

SO42−(aq)+Sn2+(aq)+     −−−→H2SO3(aq)+Sn4+(aq)+     −−−

What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and H+(aq) in the appropriate blanks. Your answer should have six terms.

Enter the equation coefficients in order separated by commas (e.g., 2,2,1,4,4,3). Include coefficients of 1, as required, for grading purposes.

Hi anyone can answar these questions or only part of them ?

1-What are the advantages of using thionyl chloride rather than other available chlorination agents?

2-When an oil bath is used to reflux a solution, why is it recommended ?

3-If charcoal is used in a recrystallization, how and why might Celite then be used subsequently?

4-Why is thionyl chloride removed by distillation at reduced pressure rather than at atmospheric pressure?

5-Illustrate the mechanism for the reaction of thionyl chloride and; (a) water and (b) a chiral alcohol.

6-Illustrate the mechanism of the reaction of cholesterol with PCl5 to yield 3-chloro-5-cholestene.

Determine the Ph

0.120 M NaClO and 4.50×10⁻² M KI

Express your answer using two decimal places.

For each solution: a.) Calculate the molarity b.)Write a chemical equation representing the formation of a solution your equation should start with: CH3CH2OH----> c.) Draw a molecular picture of the solution showing ions , solute molecules and water molecules

Ethanol solution: 2.00 mL ethanol (d=0.789g/mL) to make 150. mL of solution