a Write the chemical formula for the conjugate acid of the phosphide ion, PH₂. b Write the chemical formula for the conjugate base of hydroiodic acid, HI. CWrite the chemical formula for the conjugate acid of the aniline, CH₂N. (Enter the elements in the order: C, H, N, O.)

Aluminum has been implicated as a neurotoxic agent for Alzheimer’s patients and is known as harmful for renal failure patients. In 1985, the medical community recommended that no more than 10 mg/L Al3+ be present in drinking water used for dialysis patients. At what pH is the maximum Al3+ concentration equal to 10 mg/L, assuming that the only source of Al3+ is Al(OH)3? How does this compare with the allowable pH of drinking water of 7.8; would we expect to observe this concentration in drinking water?

The formula for the conjugate acid of HPO42- is?   A student weighs out a 2.33 g sample of sodium fluoride, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it and then adds water to the 300 mL tic mark. What is the molarity of NaF in the resulting solution?   A student wants to prepare a solution of iron(III) fluoride with a known molarity.How many grams of FeF3 must be weighed out to prepare 250. mL of a 0.245 M aqueous solution of the salt?   An aqueous solution has a hydroxide ion concentration of 1.0 x 10^-10 M. What is the hydronium ion concentration in this solution? Concentration =       M Is this solution acidic, basic or neutral?   An aqueous solution has a hydrogen ion concentration of 1.0 x 10^-6 M. What is the hydroxide ion concentration in this solution? Concentration =     M Is this solution acidic, basic or neutral?

Write the chemical formual of acid: Cl-(aq0+HS04-(aq)  HCI(AQ+SO42-(aq)

Consider the following data on some weak acids and weak bases: name hypochlorous acid nitrous acid acid solution 0.1 M CH3NH3Cl 0.1 M KNO3 0.1 M KCIO 0.1 M NaNO2 formula Ka HCIO 3.0 × 10 HNO₂ 4.5 x 107 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. X pH -8 choose one ✓ choose one choose one ✓ choose one Ś base K₂ formula methylamine CH3NH₂ 4.4 × 10 4 ammonia NH3 name 1.8 × 10 5 -5

A chemist dissolves 272. mg of pure potassium hydroxide in enough water to make up 100. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits.

Over the past 250 years, the average upper-ocean pH near the Pacific Northwest has decreased by about 0.1 units, from about 8.2 to 8.1. This drop in pH corresponds to an increase in acidity of about 30%. When CO2 levels in seawater rise, the availability of carbonate ion, CO32−, makes it more difficult for marine organisms to build and maintain shells and other body parts from calcium carbonate. Calculate H3O+ and OH− concentrations at pH levels of 8.2 and 8.1. Demonstrate by calculations that this decrease in pH corresponds to an increase in acidity of about 30%. Explain the relationship between the pH of seawater and the availability of carbonate ions. Does the change in pH from 8.2 to 8.1 result in an increase or decrease in the availability of carbonate ions?

Calculate the pH at 25 °C of a 0.14M solution of sodium hypochlorite (NaC10). Note that hypochlorous acid (HClO) is a weak acid with a pk of 7.50. a Round your answer to 1 decimal place. pH = Ś ? olo Ar

Which of the following chemical formulas corresponds to a base? HCl; KOH; H2SO4; HNO3

Which of the following is a complete balanced reaction for an Arrhenius base in water? NaOH (s) 2 NaH (s) + O2 (g) →> ○ Mg(OH) 2 (s) → Mg2+ (aq) + OH (aq) ○ HNO2 (aq) → H+ (aq) + NO₂ (aq) KOH (s) →> K+ (aq) + OH¯ (aq)