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The measurement and application of electric conductivity Physicochemical experiment
1. Understand the concept of conductivity, conductivity and molar conductivity of solution 2. Master the use of conductivity meter 3. Master the experimental method and application of alternating current bridge to measure the conductivity of solution 2. Experimental content and principle
What is the conductivity and resistivity of water?
How to explain the conductivity and resistivity of water
I mean, what are their units? How can Siemens explain them? How did they come from
You can take the conductivity pen to test, or take it to the test center to test. Generally, it's installed on the pure water machine. Well, our company sells conductivity pens
How can water with resistivity of 1500 Ω m-2500 Ω m be converted into conductivity? What is the formula for conversion into conductivity?
Resistivity = 1 / conductivity
RELATED INFORMATIONS
- 1. What instrument can measure resistance and resistivity?
- 2. What is the relationship between voltage, resistance and current in series and parallel circuits? What is bigger, what will become bigger? What gets smaller, what gets smaller? And in series or parallel sliding rheostat resistance increases, the current and voltage will have what kind of change? If the resistance decreases, what will the current and voltage change? Sorry to bother you.
- 3. Voltage of series parallel circuit In a series or parallel circuit, what is the relationship between the voltage of the power supply and the voltage of the trunk and branch in the circuit? That is, the relationship between the voltage of the power supply and the voltage of the branch and trunk?
- 4. Junior high school physics questions about the range of resistance, voltage and current As shown in the figure: (I don't want to insert the picture, just say it) the sliding rheostat is connected in series with the resistance R0, the voltmeter measures the sliding rheostat voltage, and the ammeter measures the main circuit current ——————————————————————————————————————— When the switch is closed, when the slide P of the sliding rheostat slides back and forth between certain two points, the indication range of the ammeter is 0.1.5 a, and the indication range of the voltmeter is 6 ~ 3 V. then the power supply voltage is A.6 V B.7.5 V C.9 V D.15 V
- 5. Junior high school physics when the voltage is fixed, there is such a problem in the relationship between current and resistance: a certain voltage, the measured data of current and resistance are as follows: a group of current 0.12 a, resistance 0.6 Ω; current 0.24 a, resistance 1.2 Ω; current 0.48 a, resistance 2.4 Ω. The problem is that one group of data is patchwork, which group is it? Please help to analyze, thank you
- 6. How to calculate series and parallel power How many w should two 40W bulbs in series and two 40W bulbs in parallel be?
- 7. In the experiment of exploring Ohm's law, the relationship between current and resistance should be explored. To keep the voltage unchanged and change the resistance, the function of slide is to adjust the resistance by adjusting the current Slide the rheostat to keep the voltage constant, so why can it keep the voltage constant? What's the principle?
- 8. Swiss astrophysicist Stephanie Udry (right) and University of Geneva astronomer Michel Meyer (left) hold a picture of the planetary system around red dwarf 581 (upper right corner) on April 24, 2007. The planet, code named "581c", is 190 trillion kilometers away from the earth and is orbiting a planet smaller than the sun and hotter than the sun It has been measured that its mass is about 5 times that of the earth and its diameter is about 1.5 times that of the earth A. The ratio of the gravitational acceleration on the surface of planet 581c to the gravitational acceleration on the surface of the earth can be obtained. B. the ratio of the first cosmic velocity between planet 581c and the earth can be obtained. C. The ratio of the circumfluence velocity between planet 581c and the earth can be obtained. D. the ratio of the circumfluence period between planet 581c and the earth can be obtained
- 9. It is known that the period of the earth's revolution around the sun is t, the distance between the earth and the sun is r, and the gravitational constant is g?
- 10. The toy car with mass M1 = 1kg moves at a uniform speed of V1 = 0.5m/s on a smooth horizontal plane. A small ball with mass M2 = 0.5kg and velocity v = 0.10m/s flies into the car and moves with the car Find the speed of the car and the ball moving together The impulse of the ball
- 11. In the series circuit, Xiao Ming wants to explore the relationship between current and resistance in a circuit. Now there are wires, switches, ammeters, voltmeters, sliding rheostats
- 12. A circuit consists of an ammeter, a battery pack, two small bulbs (same power), a switch and several wires Connect two small bulbs in parallel and connect them to the two positive terminals of the ammeter. After the circuit is connected, close the switch. What's the consequence? It's better to have a picture On the second floor, please be more specific
- 13. There is a bulb and a 20 ohm resistance ro. The ammeter is connected in the circuit. S1 controls the bulb and S2 controls the resistance ro. When the switch S1 is closed, S2 is disconnected There is a bulb and a 20 ohm resistance RO, and the ammeter is connected in the circuit. S1 controls the bulb, and S2 controls the resistance ro. When switch S1 is closed and S2 is disconnected, the bulb and ammeter are connected in series, and the sliding rheostat is modulated to make the bulb turn on and off normally. At this time, the current indication is 0.3A. When switch S1 is opened and S2 is closed, R0 and ammeter are connected in series, and the position of sliding rheostat is unchanged, and the indication of ammeter is 0.2A, Calculate the rated voltage and power of the bulb
- 14. The solid mass increases after combustion 2. The solid mass decreases after heating with potassium permanganate They are explained by the law of conservation of mass
- 15. The law of conservation of mass is the basic law of nature. Please explain why there is the law of conservation of mass from the micro point of view
- 16. What is the micro explanation of the work done by current
- 17. If the decline of the price of product a causes the supply curve of product B to move to the left, then () A. B is a substitute for a B. B is a joint product of A C. The demand of a decreases and the supply of B increases D. The supply of a decreases and the demand of B increases
- 18. Micro interpretation of earthquake I know that the energy source of earthquake is the powerful internal energy of the earth, but what is the reason for its energy release? Why is there such energy? Why are earthquakes prone to occur between continental plates? Who else can explain earthquakes from the microscopic perspective of physical science? All ears
- 19. How to judge the short circuit If the potential on a wire is not equal, is there a short circuit? What is it? Under what circumstances, a short circuit will occur. I want the truth. Don't worry, I can't understand it
- 20. 3. As shown in the figure, I and II are the divergent rays of the light source s (not shown in the figure) on the principal axis PQ of the lens after being refracted by the lens. In the figure, l is the position of the lens, O is the optical center of the lens, and m is the intersection point of the opposite extension lines of the two rays () A. if the luminous point s is on M, the transparent mirror is a convex lens B. if the luminous point s is on the left side of M, If s is on the right side of M, the lens is convex D. lens L must be concave