Basic concepts and calculations
Review the permitted syllabus objectives and practice reviewed questions for this CSCA topic.
What to study
- classification and changes of state of matter
- chemical notation and equation writing
- solution concentration and pH calculations
- amount-of-substance calculations
- applications of the ideal gas equation
The scope shown here follows the syllabus-derived guardrails used by the CSCAPrep question factory. Related advanced material is not added unless it appears in the defined scope.
Practice this topic
Easy · Basic concepts and calculations在标准状况下,11.2 L 的二氧化碳气体中所含的分子数约为多少?(NA 取 6.02 × 10^23 mol^-1)Easy · Basic concepts and calculations将 0.4 g 氢氧化钠固体溶于水配成 100 mL 溶液,该溶液的物质的量浓度是多少?(NaOH 摩尔质量为 40 g/mol)Standard · Basic concepts and calculations在温度为 27 ℃、压强为 1.0 × 10^5 Pa 的条件下,某气体的体积为 2.0 L。若温度升高到 127 ℃,压强保持不变,则该气体的体积变为多少?Easy · Basic concepts and calculations在标准大气压下,将一块干冰(固态二氧化碳)置于敞口容器中,一段时间后观察到固体消失,容器内无明显液体残留。该过程主要属于下列哪种变化?Standard · Basic concepts and calculations下列化学方程式书写正确的是哪一个?Easy · Basic concepts and calculations常温下,将0.01 mol的HCl气体溶于水配成1 L溶液,该溶液的pH为多少?Standard · Basic concepts and calculations在25℃时,将0.40 g氢氧化钠固体溶于水,配成200 mL溶液。取该溶液10.0 mL,加水稀释至100 mL。稀释后溶液的pH值最接近多少?(已知NaOH的摩尔质量为40 g/mol,忽略体积变化,25℃时Kw=1.0×10^-14)Standard · Basic concepts and calculations在25℃时,将0.80 g氢氧化钠固体溶于水,配成200 mL溶液。取该溶液25.0 mL,加水稀释至500 mL。稀释后溶液的pH值最接近多少?(已知NaOH的摩尔质量为40 g/mol,忽略体积变化,25℃时Kw=1.0×10^-14)Standard · Basic concepts and calculations在 25℃时,将 0.80 g 氢氧化钠固体溶于水,配成 200 mL 溶液。取该溶液 25.0 mL,加水稀释至 500 mL。稀释后溶液的 pH 值最接近多少?(已知 NaOH 的摩尔质量为 40 g/mol,忽略体积变化,25℃时 Kw=1.0×10^-14)Standard · Basic concepts and calculations在温度为 300 K、压强为 1.0 × 10^5 Pa 时,某气体的体积为 3.0 L。若温度升高到 360 K,压强变为 1.2 × 10^5 Pa,则该气体的体积变为多少?