Why does litmus have to be moistened when used to test for acidity?
374011
It doesn't if the substance that is being tested is a liquid.  If the substance is a solid, then you need water to facilitate the interaction between the substance and the litmus.
410044
Well, if the human body were unable to use buffer solutions to neutralize excess acid or base, thereby maintaining a stable pH range, you would die.\n\nNeutralization is also useful for cleanup of spills of hazardous materials.
51013
"Litmus is a natural dye made from small plants called, "lichens". These plants are of several varieties and grow in abundance in the Netherlands. When lichen called Rocella Tincotoria is allowed to react with ammonia, potassium carbonate and lime it gives a blue-color material, which is used as the coloring matter for paper. The paper is dipped into it and dried. This is what is known as blue litmus paper and used to test acids."\n\n"Orchil or cudbear is a red dye obtained from another species of lichens. This is used to make red litmus paper Alkannet or alkanna is another dye obtained from root of the plant Alkanna Tinctoria. The coloring ingredient, alkannin is soluble in alcohol, benzene and ether. When white paper is impregnated with an alcohol solution of alkannet, it becomes red. This paper is turned to blue shade by alkalis."
714556
The acid is used in a test for non reducing sugars. Without it, the test would come out negative, so you hydrolise the sugar produced during photosynthesis to reducing sugars (acid hydrolysis, followed by neutralisation), then perform Benedict's test. So basically the HCl hydrolises the sugar.
525698
I think dimethicone is used in antacid tablets, so maybe it's just to elminate stomach acid or gas.
893949
The sourness of water is due to it's high acidity as acid taste sour. Therefore  lime is added to neutralize the acidity and thus the sourness. Also alum requires an alkaline medium to work and lime provides that.
1118981
Supposedly PH balance. Most likely scents that are added, but to be honest I've used both and really haven't had a lot of differences noticed.
758893
Actually, acid medium is a way to avoid fungal overgrowth, so i'd go with neutral or slightly alkaline
545752
the snail's body needs to be moist all the time. the water not only protects the snail it also helps lubricate it. the salt absorbs the water from the snail's body.
296249
you can see if theres something severely wrong with it (if its orange, you know somethings wrong). But actual tests have to be run to see if it's perfectly healthy, you can't see all the bacteria, vitamins, etc. by sight.
581403
you can also prevent it, or some of it...if you take a lactic acid buffer (cytomax), it keeps your body from over producing lactic acid, or you can take the precurser for lactic acid (optygen), this puts small amounts of lactic acid in your muscles before your workout, and because its present already, your body will actually create less during workout giving you a lower L Acid in the end.\n\nbut if you dont suppliment, massage from the ends of the limbs to the core of your body and cooling down keeps your blood circulating w/o L A production thus re oxygenating your muscles and flushing out L A. and massage!!!
425740
It must have turned soft due to too much moisture or humid environement, or from your finger if only some tab is so. They are no more good, either not effective any more or is bad for consumption.
48939
none water is H2O two parts hydrogen 1 part oxygen any thing else the water is inpure.but in the case of fish do a 1/4 water change every week so not to shock your fish make sure you keep temp about 78 degrees or they can get ick as far as testing you dont have to test fresh water but salt water is where the nitrite cycle is critical and then you also will test ph which is idealy 8 use a hydrometer to the line as it mesures the salt level by the boyency of the device nitites no higer than 14 i belive ask you pet shop owener as it been abuot 10 years since i had my salt water tank but for fresh water, the water change should cover it.
975031
When mil sours, bacteria use the lactose and change it to lactic acid. The acid coagulatess the protein making it insoluble. Then the whey is squeezed out and the curd is aged. A salt solution can aid in drying it out.
527144
Might be the hydrochloric acid the stomach produces.
966389
Because it is quite a mild solution. There's plenty more water than acid, therefore you may assume that the properties of the water haven't changed much.
331751
I worry if it mine is dark, I'm not getting enough fluid and the urine is too concentrated or there may be a kidney problem.  When I was a medical lab scientist the accepted 'standard' colour for screening urine samples was  'straw-coloured' (the dried grass sort, not what you drink through!), anything else usually led to further testing.