how will phosphate effect water oxygen level??
112574
plants use N, K and P to live. the more phosphorus(phosphate) in the water the more plants it can support. the more plants the less oxygen for fish.\nso high phosphate levels can cause low oxygen levels.
615100
the same elements except that \n-the ammount of CO2 inceases to 4%(not certain about the value)\n-the oxygen ammount decreeases to 16%\n-the water vapour ammount also increases
788560
Most detergents have already reduced phosphate levels to below requested minimums. I think you have a stale worry and need to upgrade your worry list.
638216
All of these may have an effect on absorbance since they all have the potential to affect the final concentration of the solutions being measured; In (a), you don'y know what might be in the wet stuff in the beaker, so your absorbance might go up.  In (b), because the pipet has not been "wetted" with your solution, you might pick up less than you thought, so your concentration might be lower and give a lower absorbance.  I'll let you figure out (c) for yourself since I can't be sure what you typed!
844268
how were you measuring the pH? if it was a pH meter maybe it wasn't calibrated correctly/ recently?? or if it was with litmus paper.... maybe it went bad? I'm not sure if it can... check and see if there could have been an expiration date. i don't think temperature would have that drastic of an effect unless you did the experiment at pH7 and a seriously high (like about 60C) temp and the other ones at room temp or 37C (body temp)... sorry i cant help anymore then that, that's very strange!
925123
if the water is at very very low pressure it can become gaseous.\n\nSee also - the triple point of water
67959
Oxygen in the atmosphere reacts with iron to oxidize it in what is called a redox reaction (oxidation/reduction).  The redox reaction is defined by the exchange of electrons--uncharged iron will lose two electrons to an oxygen molecule, creating iron oxide.  Water quicken rusting by serving as a catalyst.  Dissolved oxygen in the water reacts, and as the water dries, the oxygen becomes increasingly concentrated.\n\nShips will prevent wide-spread rusting by creating what is called a "sacrificial anode."  You might know the names anode and cathode from the ends of a battery.  Batteries function by employing two seperate redox reactions, where one end corrodes to release electrons, which travel to the other end and react with metal cations in solution, turning them to a solid metal.  In the case of ships, the corrosion of iron is prevented by creating a sacrificial anode out of something even more reactive than the iron (usually magnesium, if memory serves).  The corrosion of the magnesium releases excess electrons in the iron, which delays corrosion of the iron--oxyegn can grab the free electrons created by the corrosion of magnesium without needing to corrode the iron.\n\nI would imagine that the quickening of the rusting process cause by a scratch in the tin is due to the fact that the corrosion becomes concentrated in a single place.  The scratch likely serves as the "sacrificial anode" for the rest of the can.
464536
this is a very good question, i never thought of it this way.\n\nI think the level will increase but very small amount.\n\nCO2 is being added to the water and forming H2CO3, this is staying in solution. So nothing is lost, only CO2 is being added. The density will be a little higher now, so the volume will not change by much, but should be on the postive side.\n\nOnly about one mole of CO2 can be put into solution at room temperture, which isnt much. So any change in density and volume will be very small.\nWill take too much of my time to work out the excact numbers, but what a good question.
506214
Ans. C) lead (IV) oxide acts as a catalyst and speeds up the reaction, so that more O2 is evolved per unit time.\n\nAns. D) --by increasing the temperature
928344
Tap water contains inpurities, so it will impact both of the temperatures... but since it is MOSTLY pure, meaning the amount of inpurities are very small, it is almost negligible.  I just mention this as you said "EXACTLY"...\n\nKeep in mind though, 0C and 100C assumes EXACTLY 1 atmosphere of air pressure, which we never have....
188594
I'm also amazed at the answers including the preceding one. It's true it's all about bouyancy. But is bouyancy affected significantly by the dissolved oxygen in the tissues? According to the ref., bouyancy is just about lung capacity, bone, fat and muscle ratios. And of course the salinity of the water. Also, panic-induced body tension can reduce lung capacity and muscle performance.  \nAnyway, a change in tissue oxygen level would happen slowly; it's a diffusive process. Second, the density difference of water with and without dissolved oxygen has to be minute since oxygen is only sparingly soluble.
56505
ok, well it depends on the container, what is in teh water, if teh container is filled with water to the top or if there is expansion room.  Also elevation, temperature and pressure (air pressrue) would have an impact because the container might just crack or explode
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.
25254
Yes - higher and lower pH's and different mineral contents affect plants. The safest bet would be to get the plant in the right conditions, and then water with the purest water available, preferably distilled.
359627
the p is partial pressure. if the po2 is 65 depending on the patient that is on the low side. the pco2 means the patint is breathing a little fast, but not a bad pco2... i wouldn't extubate unless i knew the rest of the blood gas was ok? if the ph was 7.35-7.5 i would....  if the patient looked okay.... pulled good volumes on the vent
194855
water food oxygen environment
766811
d. \n\nIt's a double replacement (acid/base) reaction.  The Sr and the H are both positive and they switch.  Since Sr has a 2+ charge and the PO4 has a 3- charge, you use a common multiple of 6.  The other product would be H(OH) or water.