Essays Tagged: "h2"

Vands hårdhed

fet EDTA (ethylendiamintetraeddikesyre) er opbygget på følgende måde:H O O C - C H2 H2 C - C O O Hú úN - C H2 - C H2 - Nú úH O O C - C H2 H2 C - C O O HD ... altet, og vi har derfor følgende ion, der for nemheds skyld blot betegnes EDTA4- :-O O C - C H2 H2 C - C O O-ú úN - C H2 - C H2 - C H2 - Nú ú-O O C - C H2 H2 C - C O ...

(3 pages) 28 0 4.0 Dec/1996

Subjects: Science Essays > Chemistry

Parental Supervision and Teen Pregnancy

sisH1: Teens who have babies are more likely to have had them due to a lack of parental supervision.H2: What parents allow their teens to watch and listen to at home is directly associated with the hi ...

(6 pages) 185 0 5.0 Apr/2004

Subjects: Social Science Essays > Sociology

Alternative Fuel

sts of two chemical elements, hydrogen and oxygen. Each molecule of water consists of two hydrogen (H2) atoms and one oxygen (O) atom. Chemical binding between these three atoms is very stable and str ... n of hydrogen and oxygen is under normal circumstances very intense and generates a lot of energy. 2H2 + O2 ® 2H2O + energy Both, hydrogen and oxygen are gases at normal temperatures and pressures ...

(10 pages) 282 1 4.2 Apr/2004

Subjects: Science Essays > Environmental Science

Reaction (rate) between magnesium ribbon and hydrochloric acid

eate magnesium chloride and hydrogen. The balanced formula for this is:Mg(s) + 2HCL(aq) MgCl2(aq) + H2(g)Magnesium + hydrochloric acid Magnesium Chloride + HydrogenMagnesium will react with hydrochlor ...

(9 pages) 37136 0 3.0 May/2004

Subjects: Science Essays > Chemistry

Rates of reactions coursework (GCSE)

concentration on the reaction between magnesium and hydrochloric acid.Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g)Aim:In this experiment I am going observe and record the reaction between magnesium and differe ...

(2 pages) 31 0 2.3 Jul/2004

Subjects: Science Essays > Chemistry

Acid rain Investigation

sly with acid leaving a solution of magnesium sulphate and hydrogen below is the word equation.Mg + H2So4 MgSo4 + H2How is acid rain formed?Some air pollutants are acidic gases particularly sulphur di ... ike this make rain water acidic. Acid rain has a ph of between 5 and 2 the equation for acid rain isH2O + SO2 H2SO3Some factors affecting the reaction rate are as follows,TEMPERATUREAt higher temperat ...

(3 pages) 18 0 1.0 Jan/2005

Subjects: Science Essays > Chemistry

Rates of Reaction: GCSE Chemistry.

ATION:Magnesium(s) + Hydrochloric acid(aq) = Magnesium Chloride(aq) +Hydrogen(g)Mg + 2HCl = MgCl2 + H2In the reaction when the magnesium hits the acid when dropped in,it fisses and then disappears giv ... point on graph 1 in blue. Another possible reason is that when the reaction takes place, bubbles of H2 are given off, which might stay on the magnesium, therefore reducing the surface area of the magn ...

(8 pages) 40 0 3.0 Oct/2005

Subjects: Science Essays > Chemistry

Rates Of Reaction Investigation

te Magnesium chloride and Hydrogen. The balanced formula for this is:Mg(s) + 2HCL(aq) = MgCl2(aq) + H2(g)Magnesium + Hydrochloric Acid => Magnesium Chloride + HydrogenMagnesium will react with Hydr ... y were not perfect. Some of the reasons for this may be:* When the reaction takes place, bubbles of H2 are given off, which might stay on the Magnesium, therefore reducing the surface area of the Magn ...

(6 pages) 17 0 0.0 Nov/2006

Subjects: Science Essays > Chemistry

Rate of reaction between Hydrochloric acid and magnesium

fferent temperatures. The products that will be formed are Magnesium Chloride (MgCl2) and Hydrogen (H2).Prediction:I predict that as the temperature increases the rate of reaction also increases. To f ...

(3 pages) 14 0 3.0 Nov/2006

Subjects: Science Essays > Physics

A comparison between the Enthalpy of formation of MgO acquired via a series of reactions and Hess's Law (will they be equivalent?)

nvestigation, we will see how accurate and precise Hess's Law can be.MgO(s) + 2 H+(aq) ( Mg2+(aq) + H2O(l) ΔH°2 = ?Mg(s) + 2 H+(aq) ( Mg2+(aq) + H2(g) ΔH°3 = ?+ H2(g) + ½ O2 ... ΔH°2 = ?Mg(s) + 2 H+(aq) ( Mg2+(aq) + H2(g) ΔH°3 = ?+ H2(g) + ½ O2(g) ( H2O(l) ΔH°4 = -286 kJ/molMg(s) + ½ O2 (g) ( MgO(s) ΔH°f = ?The series of ...

(2 pages) 2955 0 0.0 May/2007

Subjects: Science Essays > Chemistry

Sodium Hydroxide - Production

by the electrolysis of brine (aqueous sodium chloride) Electrolysis 2 Na+(aq) + 2 Cl¯(aq) + 2 H2O (l)>>> Cl2 (g) + H2 (g) + 2 Na+(aq) + 2 OH¯(aq) During electrolysis, chlorine is f ... drogen and hydroxide ions are formed at the cathode i.e. 2Cl¯ >>> Cl2 + 2e¯ and 2H2O + 2e¯ >>> H2 + 2OH¯ The removal of chloride and hydrogen leaves sodium ions a ...

(2 pages) 19 0 5.0 Sep/2001

Subjects: Science Essays > Chemistry

OXIDATION-REDUCTION REACTION OF MAGNESIUM

icted by the theoretical calculation of a balanced equation: Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) PROCEDURE First we obtained a strip of pre-cut magnesium ribbon, cleaned it with steel wool t ... 8g Volume of Gas 80ml Volume of Gas 82ml Volume of Gas 87ml H2O Temperature 24˚C H2O Temperature 24˚C H2O Temperature ...

(4 pages) 9 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Chemistry Laboratory Report: Factors affecting reaction rates

ussions:The reaction between magnesium and hydrochloric acid:Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)Increasing the concentration of the hydrochloric acid will increase its solubility. The higher ...

(1 pages) 4197 0 0.0 Nov/2008

Subjects: Science Essays > Chemistry

The Ideal Gas Constant

ly formed faster and faster as the HCl react with Mg ribbon, soon about 1/3 of the tube was full of H2 , and after just about one minute the reaction had stopped and the tube was a little over half fu ... 65.2765.2Calculations: Trial 1:Mass of Mg ribbon:1.94/200 =0.0097g/cm0.0097(4.4) =0.04268gVolume of H2 gas in liters:44.50mL of H2 gas = 0.0445LRoom temperature in K:0oC = 273.15K23.5oC = 296.65KPress ...

(2 pages) 1847 0 0.0 Nov/2008

Subjects: Science Essays > Chemistry