利用酸碱中和基本原理,通过已知物质的量浓度的酸或碱溶液(即标准液)测定未知的碱或酸(即待测液)。
对于一元酸与一元碱的反应:
c(标)v(标)= c(待)v(待)
故c(待)=c(标)v(标)/v(待)

酸碱中和指示剂能在一定范围内随溶液中氢离子活度的高低进行解离及重组。解离重组后其分子与离子颜色不同,则可根据溶液颜色变化判断溶液的pH值或酸碱反应的终点。
| 品名 | CAS | 货号 |
|---|---|---|
| Alizarin Yellow R, 90% 茜素黄R | 2243-76-7 | 603564 |
| Bromocresol Green, for analysis, Indicator 溴甲酚绿 | 76-60-8 | 978615 |
| Bromocresol Purple, indicator, ACS reagent 溴甲酚紫 | 115-40-2 | 422158 |
| Bromophenol Blue, for analysis, Indicator 溴酚蓝 | 115-39-9 | 978967 |
| Bromothymol Blue, for analysis, Indicator 溴百里酚蓝 | 76-59-5 | 999513 |
| Chlorophenol Red, 95%, indicator 氯酚红 | 4430-20-0 | 358566 |
| Cresol Red, indicator 甲酚红 | 1733-12-6 | 460017 |
| Litmus 石蕊 | 1393-92-6 | L0062 |
| Methyl Orange, indicator 甲基橙 | 547-58-0 | 313050 |
| Methyl Red, indicator 甲基红 | 493-52-7 | 116480 |
| Methyl Yellow, indicator 甲基黄 | 60-11-7 | 985460 |
| Neutral Red, indicator 中性红 | 553-24-2 | 954442 |
| Phenol Red, indicator 苯酚红 | 143-74-8 | 600238 |
| Phenolphthalein, indicator 酚酞 | 77-09-8 | 152721 |
| Sudan IV 苏丹 IV | 85-83-6 | 313197 |
| Thymol Blue, for analysis, Indicator 百里酚蓝 | 76-61-9 | 939068 |
| Thymolphthalein, for analysis, Indicator 百里酚酞 | 125-20-2 | 933094 |
| α-Naphtholphthalein, 98%, indicator α-萘酚酞 | 596-01-0 | 196977 |
| 品名 | CAS | 货号 |
|---|---|---|
| 2-Aminonaphthalene 2-萘胺 (标准品) | 91-59-8 | R-084N 危化品 |
| 8-Hydroxy-1.3.6-pyrenetrisulfonic acid trisodium salt, 85% 8-羟基芘-1,3,6-三磺酸三钠盐 | 6358-69-6 | 494598 |
| Eosin Y 曙红Y | 15086-94-9 | 985235 |
| Salicylic acid, 99.5%, for analysis 水杨酸 | 69-72-7 | 957286 |
| 品名 | CAS | 货号 |
|---|---|---|
| Sodium bicarbonate, 99.5%, for analysis 碳酸氢钠 | 144-55-8 | 907280 |
| Sodium carbonate, 99.8%, for analysis 碳酸钠 | 497-19-8 | 993210 |
| Sodium hydroxide solution, 0.1 M solution in water 氢氧化钠溶液 | 1310-73-2 | 984063 危化品 |
| Sodium hydroxide, 96%, for analysis 氢氧化钠 | 1310-73-2 | 904646 |
| 产品名称 | 货号 |
|---|---|
| Erlenmeyer Flask 125mL ST #22 Stopper 锥形瓶125mL ST#22塞子 | LG-7790-106 |
| Universal pH Indicator Paper, pH 0-14, pkg of 100 ea 广泛pH试纸 , pH 0-14, 小方塑盒装 | 943819 |
| Special pH Indicator Paper, pH 6.4-8.0, pkg of 100 ea 精密试纸 , pH 6.4-8.0, 小方塑盒装 | 918892 |
| Plastic graduated cylinder, capacity: 100 ml, 10 pcs/pack 塑料量筒 , 容量: 100ml, 10个/盒 | 985822 |
| PTFE beaker, 100 ml 聚四氟乙烯烧杯 , 100 ml | 957765 |