The two step equation of conversion of marble (calcium carbonate or limestone) to gypsum dehydrate should be determined. Concept Introduction: Due to access pollution in urban areas or metro cities, there is an increased level of air pollution. The most commonly found gas is SO 2 - sulphur dioxide in air that is responsible for acid rain or acidic deposition. Acid rain or acidic deposition can be of two types: dry and wet. Dry deposition is normally occurring due to reaction of sulphur dioxide or nitrous oxides with calcium carbonate present in walls of buildings like monuments. Wet rain is seen when the sulfuric or nitrous acids formed in atmosphere and falls on ground along with rain, fog, snow or hail.

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Calculating the pH at equivalence of a titration A chemist titrates 210.0 mL of a 0.1003 M hydrobromic acid (HBr) solution with 0.7550M KOH solution at 25 °C. Calculate the pH at equivalence. Round your answer to 2 decimal places. Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added. pH = ] ☑ o0o 18 Ar

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Chapter 6, Problem 6.85P

Interpretation Introduction

Interpretation:

The two step equation of conversion of marble (calcium carbonate or limestone) to gypsum dehydrate should be determined.

Concept Introduction:

Due to access pollution in urban areas or metro cities, there is an increased level of air pollution. The most commonly found gas is SO2 - sulphur dioxide in air that is responsible for acid rain or acidic deposition. Acid rain or acidic deposition can be of two types: dry and wet.

Dry deposition is normally occurring due to reaction of sulphur dioxide or nitrous oxides with calcium carbonate present in walls of buildings like monuments. Wet rain is seen when the sulfuric or nitrous acids formed in atmosphere and falls on ground along with rain, fog, snow or hail.

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Calculating the pH at equivalence of a titration A chemist titrates 210.0 mL of a 0.1003 M hydrobromic acid (HBr) solution with 0.7550M KOH solution at 25 °C. Calculate the pH at equivalence. Round your answer to 2 decimal places. Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added. pH = ] ☑ o0o 18 Ar

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Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1