1. Write the formula of the conjugate base for acidH2CO3.Express your answer as an

1. Write the formula of the conjugate base for acid H2CO3.

Express your answer as an

ion.

2. Calculate the [OH−] of each aqueous solution with the following [H3O+]:

stomach acid, 4.5×10−2M

Express your answer using two significant figures.

urine, 6.0×10−6M

Express your answer using two significant figures.

orange juice, 2.2×10−4M

Express your answer using two significant figures.

bile, 7.0×10−9M

Express your answer using two significant figures.

3.what is the balanced equation for the neutralization of each of the following.

 H2SO4(aq) and KOH(aq)

Express your answer as a chemical equation. Identify all of the phases in your answer.

HCl(aq) and Al(OH)3(s)

Express your answer as a chemical equation. Identify all of the phases in your answer.

H2SO3(aq) and Mg(OH)2(s)

4. What is the chemical formula for the base cobalt(III) hydroxide?

Express your answer as a chemical formula.

The formula for the selenate ion is SeO42−. Predict the formula for selenic acid.

5. How many moles of Ba(OH)2 are present in 125 mL of 0.600 M Ba(OH)2?

Express your answer with the appropriate units.