فرم درخواست عضویت در انجمن علمی و آموزشی معلمان شیمی استان خوزستان
شرایط عضویت:
- داشتن مدرک کارشناسی و بالاتر شیمی و رشته های مرتبط برای دبیران شیمی شاغل و یا بازنشسته
- داشتن مدرک کاردانی شیمی و رشته های مرتبط
- پرداخت حق عضویت
مدارک لازم:
1. فرم تکمیل شده درخواست عضویت
2. فتوکپی شناسنامه
3. فتوکپی آخرین حکم کارگزینی
4. دو قطعه عکس 4×3
5. اصل فیش پرداخت حق عضویت
فرم درخواست عضویت
نام: نام خانوادگی: نام پدر: شماره شناسنامه: ناحیه/منطقه:
مقطع تدریس: متوسطه راهنمایی مدرک تحصیلی: ................
رشته تحصیلی: .......................
درچه زمینه ای علاقه مند به همکاری با انجمن شیمی هستند:
(سایر موارد ......................................)
روزهایی که می توانید با انجمن همکاری نمایید: ......................
آدرس محل کار و تلفن: ..................................................................................
آدرس دقیق محل سکونت و تلفن: ......................................................................
اینجانب .......................دبیر ناحیه / منطقه ...................با کد پرسنلی ................رضایت
خود را مبنی بر پرداخت یکصد هزار ریال حق عضویت سالانه به شماره حساب 22/760314
(جاری الکترونیک جام) بانک ملت شعبه امانیه اهواز اعلام می نمایم.
۱- آزمایش تعیین سختی آب( درحد مفهوم ومحاسبه های ساده)
۲- سنجش حجمی اسید وباز ( با مفهوم استوکیو متری و به کاربردن شناساگر )
۳- گرماسنجی (با مفهوم گرما سنج وکاربرد آن؛ محاسبه ی ساده و قانون هس
۴- رسانایی سنجی ( درحدمحلول های داده شده درکتاب )
۵ - تعیین نقطه ی ذوب وجوش ( درحد مواد خالص درکتاب )
۶ - تجزیه وزنی ( درحدمثال های کتاب های درسی )
منصور بیگدلی سر گروه
زهرا امینی عضو گروه
ژیلا نقدی عضو گروه
زهره قدیم نژاد عضو گروه
1- ترجمه متن
solution
Solutions are homogeneous mixtures of two or more substances. Usually the solution is a liquid, but this is not required. Gaseous and solid solutions do exist.
Normally, a mixture has two components, the solvent and the solute. The solvent has the greater number of moles; the solute has fewer moles. The solute is also normally the substance of interest, whereas the solvent is a convenient vehicle for it. Consequently, solutions are generally labeled with the solute, and the solvent might not even be mentioned. The most common of all solvents is water. Solutions with water as the solvent may be described as aqueous.
Since solutions are a mixture, the ratio of solute to solvent varies. This ratio of solute to solvent (or to the entire solution) is called concentration. Many units can be used for concentration. The two emphasized in this chapter are molarity and molality.
molarity (M) = moles of solute/liters of solution = mmol solute/mL solution (Equation 5.1)
molality (m) = moles of solute/kg of solvent (Equation 5.7)
Molarity is used in problems involving osmotic pressure and stochiometry. Molality is used in problems involving freezing point depression and boiling point elevation. It is important to notice the similarities and differences between the two units. While both look at moles of solute, molarity divides by liters of solution and molality by kilograms of solvent. This means that the method by which solutions of a particular molarity are made is different from that for making solutions of a particular molality. In making a molar solution, the volume of the entire solution, solute and solvent, must be measured. On the other hand, the mass of thesolvent is measured in molality. Solvent and solute must be measured separately. Because the names, symbols, and numeric values for both concentration units are similar, it is easy to confuse these two units. Equations 5.1 and 5.7 are used when working from the pure substance to the mixture or the reverse. If you are diluting, adding solvent to a solution to decrease the concentration, you should use Equation 5.3.
MiVi = MfVf (Equation 5.3)
Because of a quirk of the math, you may use any units for volume in this equation, provided that it is the same one for Vi and Vf.
Substances that form ions when dissolved in solution are called electrolytes. Strong electrolytes are solutes that only exist as ions in solutions. For aqueous solutions there are two classes of strong electrolytes, strong acids and soluble salts. Weak electrolytes form some ions but exist primarily in their original form. In aqueous solutions weak electrolytes are moderately soluble salts, weak acids, and weak bases. Nonelectrolytes do not form ions at all. Most molecular compounds other than acids and bases are nonelectrolytes. When doing calculations for colligative properties (osmotic pressure, boiling point elevation, and freezing point depression) of strong electrolytes, the total concentration of ions should be used, unless the calculation is to determine the van't Hoff factor. When doing net ionic equations, only strong electrolytes are written as ions.
2 – چرا دماسنج جیوه ای دقیقتر از دماسنج الکلی است ؟
3- برای دو واکنش با انرژی فعال سازی متفاوت ، افزايش دما سبب افزايش ثابت سرعت ( K ) کدام يک به ميزان بيشتری می شود ؟
