Question

# 1.)What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and...

1.)What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 25mL of 12 M NH3 in enough water to make 1.00L of solution? Kb=1.80x10-5 for NH3. Calculate the change in pH after addition of 50.0mL of 0.15M NaOH.

2.)What mass of Na2SO4 (molar mass=142.0 g/mol) must be added to 350mL of 0.16M Ag+ to initiate precipitation of Ag2SO4? The Ksp of Ag2SO4 is 1.2x10-5. Assume no volume change occurs upon addition of Na2SO4.

3.)What is the pH of a sturated solution of Fe(OH)2? Ksp=4.87x10-17.

#### Earn Coins

Coins can be redeemed for fabulous gifts.

##### Need Online Homework Help?

Most questions answered within 1 hours.

##### Active Questions
• A 25 mm diameter egg roll (k = 1 W/m degree Celsius) is roasted with the...
• Instruments in airplane A indicate that, with respect to the air, the plane is headed 30°...
• You wish to test the following claim (H1H1) at a significance level of α=0.05α=0.05.       Ho:μ=73.9Ho:μ=73.9       H1:μ≠73.9H1:μ≠73.9...
• Let X1 and X2 be independent Poisson random variables with respective parameters λ1 and λ2. Find...
• You wish to test the following claim (H1H1) at a significance level of α=0.001α=0.001.       Ho:μ=88.8Ho:μ=88.8       H1:μ>88.8H1:μ>88.8...
• You have been asked to install floor tiles and paint your aunt’s bathroom based on the...