Please answer the following questins with calculations

Q 1 In the following reaction the precipitation of silver bromide is quantitative.

AgNO_3(aq) + NaBr_(aq) AgBr_(s) + NaNO_3(aq)

If 23.45 mL of 0.0457 M AgNO_3(aq) reacts exactly with a 25.0 mL aliquot of NaBr_(aq), what is:

A The concentration of the sodium bromide solution in moles/L?

B What mass of silver bromide is formed?

Q2 Explain how the equivalence point of a titration reaction can be determined using a pH probe. Use a sketch of the titration of 0.1 M HCl with 0.1 M NaOH solution in your explanation.

Q3

a) The primary standard sodium carbonate can be used to standardise hydrochloric acid. A technician conducted four titrations using 25.0 mL aliquots of 0.0479M Na₂CO₃. The average volume of the unstandardized acid was 18.16 mL. The indicator used was screened methyl orange.

A Write the balanced equation for the reaction

B Calculate the concentration of the HCl solution.

C Calculate the concentration of the HCl solution.

Q4

Calculate the mass in grams of the solid reagent needed to make up one litre (1L) of 2M Potassium hydroxide KOH?

B Calculate the mass in grams of the solid reagent needed to make up 250mL of 20% m/v Potassium hydroxide KOH?

Q5

Part A: If the Stock Bleach is 4%, how much bleach do you need to measure out to make 100 mL of 1% solution?

If instead, we consider Stock Bleach (4%) as being 100%, how much bleach do you need to measure out to make 100 mL of 1% solution?

Part B: 70% Ethanol Cleaning Solution

If the stock is 100% (Absolute Alcohol), how much do you need to measure out to make 100 mL of 70% solution?

Q 6 ) If 10.00 mL of 1.00 M HCl neutralized 20.00 mL of a NaOH solution. What would be the molarity of the NaOH?

Q 7 ) Two solutions were titrated to the endpoint. 18.55 mL of 2.0051 M HCl and 21.22 mL of NaOH solution were used. What was the molarity of NaOH ?

Q8

A 20.0 ml aliquot of a sample of Na₂SO₃ is titrated to a colourless endpoint by 17.82 mL 0.0100 M acidified KMnO₄. Determine the concentration of the thiosulfate ion in the sample. Show your working.

2MnO₄^-_(aq) + 16H⁺_(aq) + 10S₂O₃^2-_(aq) 2Mn²⁺_(aq) + 8H₂O_(aq) + 5S₄O₆^2-_(aq)

_Q9

How would the following be disposed of in your laboratory:

500 mL of dilute nitric acid (0.15M)

150 mL of silver ion solution

75 mL of ethanol

125 mL of 0.1 M Pb²⁺ solution

350 mL of 5 % v/v solution