Hydrofluoric acid (HF) can be manufactured by treating calcium fluoride (CaF2) with sulfuric acid (H2SO4). A...

Hydrofluoric acid (HF) can be manufactured by treating calcium fluoride (CaF2) with sulfuric acid (H2SO4). A sample of fluorospar (the raw material) contains 75% by weight CaF2 and 25% inert (nonreacting) materials. The pure sulfuric acid used in the process is in 30% excess of that theoretically required. Most of the manufactured HF leaves the reaction chamber as a gas, but a solid cake is also removed from the reaction chamber that contains 5% of all the HF formed, plus CaSO4, inerts, and unreacted sulfuric acid. How many kilograms of cake are produced per 100 kg of fluorospar charged to the process? Assume complete conversion of the limiting reactant.

Expert Solution

queen_honey_blossom answered 2 years ago

Solid calcium fluoride (CaF2) reacts with sulfuric acid (H2SO4) to form solid calcium sulfate (Ca... Solid...

Solid calcium fluoride (CaF2) reacts with sulfuric acid (H2SO4) to form solid calcium sulfate (Ca... Solid calcium fluoride (CaF2) reacts with sulfuric acid (H2SO4) to form solid calcium sulfate (CaSO4) and gaseous hydrogen fluoride (HF). The HF is then dissolved in water to form hydrofluoric acid. A source of calcium fluoride is fluorite ore containing 96.0 wt% CaF2 and 4.0 wt% SiO2. In a typical hydrofluoric acid manufacturing process, fluorite ore is reacted with 93 wt% aqueous sulfuric acid, supplied...

If 100 mL of 1.0 M sulfuric acid, H2SO4, is neutralized with 1.0 M calcium hydroxide,...

If 100 mL of 1.0 M sulfuric acid, H2SO4, is neutralized with 1.0 M calcium hydroxide, Ca(OH)2, how many mL of base must be added?

Sulfuric acid, H2SO4, is somewhat unique in that it is a diprotic acid but it is...

Sulfuric acid, H2SO4, is somewhat unique in that it is a diprotic acid but it is also a strong acid. Thefirst dissociation of H2SO4 is as a strong acid, and is thus a complete dissociation. However, thesecond dissociation of H2SO4 is as a weak acid. Unlike with other polyprotic acids, you cannotneglect the second dissociation of H2SO4 because it will impact the pH of the solution. Determine the pH and the concentrations of all aqueous species (H + , OH...

a) A buffer contains significant amounts of hydrofluoric (HF) and sodium fluoride (NaF). Write the net...

a) A buffer contains significant amounts of hydrofluoric (HF) and sodium fluoride (NaF). Write the net ionic equation showing how this buffer neutralizes added HNO3. Express your answer as a chemical equation. Identify all of the phases in your answer b) Write the net ionic equation showing how this buffer neutralizes added KOH. Express your answer as a chemical equation. Identify all of the phases in your answer

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Concentrated sulfuric acid is 96.0% (w/w) sulfuric acid (H2SO4, MW = 98.1g/mol) and has a density...

Concentrated sulfuric acid is 96.0% (w/w) sulfuric acid (H2SO4, MW = 98.1g/mol) and has a density of 1.84 g/mL. Determine the volume needed to prepare 500 mL of a 1.00 M solution.

Find the pH of a 0.245 M NaF solution. (The Ka of hydrofluoric acid, HF, is...

Find the pH of a 0.245 M NaF solution. (The Ka of hydrofluoric acid, HF, is 3.5×10−4.)

Hydrofluoric acid, HF, has a K a of 6.8 × 10í. What are [H3O+ ], [Fí...

Hydrofluoric acid, HF, has a K a of 6.8 × 10í. What are [H3O+ ], [Fí ], and [OHí ] in 0.790 M HF? [H3O+] = (unrounded) [F ] = M [OHí ] = (Enter your answer in scientific notation.)

Hydrofluoric acid (HF) is produced by reaction with a massive flow rate of 6000 kg /...

Hydrofluoric acid (HF) is produced by reaction with a massive flow rate of 6000 kg / h and 99% pure calcium fluoride (CaF2) sulfuric acid. The reaction takes place with 97% conversion. The reaction equation is given below: CaF2 (solid) + H2SO4 (g) → CaSO4 (solid) + 2HF (g) Solid by-product, unreacted solid reagents and impurities are taken from the bottom of the reactor. The gas phase HF and unreacted H2SO4 are taken from the reactor and sent to the...

In a titration, 25.0ml of .35 M hydrofluoric acid, HF solution is titrated with NaOH solution....

In a titration, 25.0ml of .35 M hydrofluoric acid, HF solution is titrated with NaOH solution. a) Calculate the solution ph when 13.0ml of .25 M NaOH is added to the acid. b) Calculate the solution ph at the equivalence point.

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