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dilute hydrochloric acid formula

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Question:Can anyone tell me why dilute hydrochloric acid is used in testing rocks. What does it mean if it fizzes, and what does it mean if it does not fizz. We had a load of rocks to identify, and we were asked to do a dilute hydrochloric acid test, what does this prove, does it have something to do with the cement bonding/ chemocal structure. Thanks

Answers:To identify limestone then a drop of hydrochloric acid will 'fizz' as CO2 is produced. No fizzing means that the rock is not limestone and resorting to a magnifier could sort out the rock type. Some sandstones fizz because the cement bonding the grains is calcitic, Again this will help to identify a rock. Magnesian limestone needs warm HCl to fizz because the rock contains magnesium as well calcium in its structure.

Question:Can anyone tell me why dilute hydrochloric acid is used in testing rocks. What does it mean if it fizzes, and what does it mean if it does not fizz. We had a load of rocks to identify, and we were asked to do a dilute hydrochloric acid test, what does this prove, does it have something to do with the cement bonding/ chemocal structure. Thanks

Answers:Limestone, which consists of calcium carbonate, reacts with hydrochloric acid to produce CO2, so it fizzes. Dolomite (MgCa carbonate) is slightly less reactive, but will fizz if the rock is first ground up. If you are looking at a sandstone, and it fizzes, then you can assume it is cemented by Calcium carbonate. The test is used to confirm the presence (or absence) of these carbonate minerals.

Question:I'm trying to etch my concrete and it says when diluting Hydrochloric Acid do 1 to 3 parts of water. I think there are 24g in 1000g of solution. On the bottle its says <24% (down at the bottom of the bottle it says 1000g).

Answers:1 part acid to 3 parts water ex:for a 3 gallon jug use 1 gallon of acid and 2 gallons of water

Question:i need a dilute acetic acid for a chemistry project..i need its common name and chemical formula

Answers:dilute acetic acid is Vinegar, the chemical formula is CH3COOH

From Youtube

Hydrochloric Acid Bomb in Claviers, France :If you chose to risk it, all it takes is Hydrochloric acid (23% dilution works fine, and isn't corrosive), aluminum wrap and a plastic bottle (used 1.5 liter in video). Pour the acid into the bottle so that the height of the liquid doesn't exceed half an inch. When you are done pouring in the acid, take thin pieces of aluminum and put them in the bottle quickly; have all the aluminum ready to put in at once (reaction may start before you are ready if slow). A good quantity of aluminum is required to provide enough fuel for the bomb to go off. Once the aluminum is in, close the cap and put the bottle down (it does not have to be shaken). You are safe until steam appears inside the bottle, at which point you must distance yourself immediately as the explosion is imminent. If the bomb doesn't go off immediately, be patient, the the reaction sometimes takes a minute or two to start. Please post any questions in "Comments" and I will make sure to answer them. Be safe

How to Perform a Dilution :Description: Most chemicals come in what is called a stock solution. Stock solutions are generally raw and very concentrated and most labs need only a low concentration. This is handled by performing a dilution, usually involving mixing the chemical with distilled water. This video will demonstrate the formula for figuring out how much chemical and water are needed and also reinforce the concept of adding acid to water and never vice versa. Content Area: Physical Science/Chemistry Instructional Objective: After viewing this video, a student will be able to calculate how much chemical and how much water should be mixed to make a dilution of a known concentration. Learner Description: This video is targeted at middle school or high school physical science and chemistry students, although at a general level, college students taking an introductory lab science could also benefit from viewing. Assessment: edtech2.boisestate.edu