Citric Acid

Citric acid is concentrated in citrus fruits and plays a central matabolic role in nearly every animal and plant cell. How many moles of citric acid are in 1.90 qts of lemon juice *d=1.09 g/ml* that is 6.62% citric acid by mass? *Ive tried this problem 4 times and cant figure out the answer...Please post the stoich... set ...continues

General Chemistry

When compound Y is heated it decomposes to the element X and hydrogen gas. Decomposition of 1 g of y yeileds 0.0250 mol gas. Calculate the possible molar mass values for x.

Ccalculations with dimensional analysis and correct significant figs

Calculate the number of mL in a volume of 1.000ft^3 With equivalence statements: 1ft=12 inches; 1 inch = 2.54 cm; 1 cm^3 = 1 mL I am not sure if I cube the whole equation or not?

Dimensional analysis

If an aluminum sphere has a mass of 23.01 grams and was heated to 137.0 Celsius and lowered into a cup containing 20.00 mL of water at 21.0 Celsius. The final temperature of the water and the sphere was 44.0 Celsius assuming no heat was loss calculate the specific heat of the aluminum in the sphere. C h2o =4.184J/g-0celsius ...continues

Chemical reactions

In a double replacement what comes from or forms from ___Cu(NO3)2 (aq) +__ NaOH (aq) What about __Fe(NO3)3 (aq) + __NaOH (aq)?

This question deals with aluminum chemistry and the formation of aluminum hydroxide from aluminum sulfate and water

Assume we have a 1000L tank of water and very dilute weak acids. To this tank we add and dissolve 260 grams AL2(SO4)3 (solid granules) --- the resultant pH is 4. The intention is to form AL(OH)3 solids/particles in this reaction. Question 1: How much Al(OH)3 will be formed in this reaction at pH=4.0 Question 2: If the pH w ...continues

Calculating mass of sulfuric acid to affect pH change?

I have a 2 part question concerning the use of H2SO4 to adjust the pH of a solution: 1. How many grams per liter of H2SO4 is required to adjust the pH of a solution from 3.8 to 2.8 assuming the sulfuric acid fully ionizes? 2. If in reality however, the actual sulfuric acid ionization/dissociation is a 2 step process and no ...continues

pH adjustment of a solution with NaOH or Ca(OH)2?

Assume you have a 64000L volume of solution (predominantly water) with a pH of 4.03. 1. How much NaOH would be required to raise the pH to 5.5? 2. Or, if using Ca(OH)2 --- how much calcium hydroxide would be required to raise the pH of this solution to 5.5? In each case, assume full ionization of the base.

The required amount of carbonate chemistry to raise the pH of a fixed volume of liquid?

I am trying to determine the amount of sodium carbonate (Na2CO3) necessary to raise the pH of a 64000 L volume of liquid from a pH of 4.0 to a pH of 8.0? I have performed all of the carbonate dissociation calculations and have attached to this message.....I have gone over my logic and math numerous times and think I have the ...continues

Calculating solubility of aluminum in aluminum sulfate (AL2(SO4)3) at various pH levels?

Alum (aluminum sulfate) is used as a flocculant to floc an anionic material in a water solution at pH = 4.0 and temperature = 130 degrees F. The solubility of the alum is noted as 87 grams per 100 cc's of liquid (assuming std temp & pressure). Assume 1 liter of solution....based on this, how would I determine the actual solub ...continues