Question 8: Fill in the mass values to 2 significant figures Calculate the mass in grams of sodium nitrite (NaNO2) that must be added to 500.0 mL of 0.020 M nitrous acid (HNO2) to make a pH 4.00 buffer. Neglect volume changes. Calculate the mass in grams of ammonium bromide (NH4Br) that must be added to 500.0 mL of 0.030 M ammonia (NH3) to maks a pH 9.00 buffer. Neglect volume changes.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.